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Explainers, how-to guides and the occasional news note. The answer comes first, always, then the numbers, diagrams and sources for going deeper.

Answer card: Moonshot AI released the full weights of Kimi K3 on Hugging Face in late July 2026, a 2.8 trillion parameter mixture of experts model with 104 billion active parameters per token, a one million token context window, MXFP4 weights totalling about 1.4 terabytes, released under the Kimi K3 License.

Dev News

Moonshot Ships Kimi K3 Weights, All 1.4 TB of Them

Moonshot AI published the full weights of its 2.8 trillion parameter Kimi K3 on Hugging Face, along with the attention kernels and MoE communication library behind it.

 Answer card: Roblox began the public alpha of Build on July 28 2026 in New Zealand, a mobile tab that turns text prompts into playable games, open to age checked users nine and older with publishing restricted to sixteen and over, sharing its back end, models and chat history with Roblox Studio.

Dev News

Roblox Opens Its Prompt to Game Alpha, Judged on Retention

Build enters public alpha in New Zealand on July 28. A phone turns a prompt into a playable game, then faces the same discovery ranking as every other Roblox title.

 Answer card: Canonical announced an opt in virtualization hardware enablement stack for Ubuntu 26.04 LTS in July 2026, shipping qemu-hwe, libvirt-hwe, edk2-hwe and seabios-hwe with a six month refresh cadence over the first two years of the release, managed as one unit by the ubuntu_virt_helper tool.

Sysadmin News

Ubuntu 26.04 LTS Gets an Opt In Virtualization HWE Stack

Canonical will ship qemu-hwe, libvirt-hwe, edk2-hwe and seabios-hwe on a six month cadence, so an LTS host can track newer QEMU without leaving the LTS.

 Answer card: the FreeBSD Q2 2026 status report contains 41 entries, including a clean room NTSYNC driver compatible with the Linux 7.0 interface, an AMD ROCm port, GENEVE tunnel support, native MPLS from Summer of Code 2026 and full CPUID control in bhyve.

Sysadmin News

FreeBSD Wrote Its Own NTSYNC Driver, Without Linux Code

The Q2 2026 status report runs to 41 entries. The headline is a clean room NTSYNC driver matching the Linux 7.0 interface, with an AMD ROCm port in progress.

 Answer card: the MCP 2026-07-28 revision removes the initialize handshake and the Mcp-Session-Id header, requires Mcp-Method and Mcp-Name headers on the Streamable HTTP transport, adds ttlMs and cacheScope to list responses, and deprecates Roots, Sampling and Logging under a twelve month policy.

Dev News

MCP Goes Stateless Today, and Sticky Sessions Go With It

The 2026-07-28 revision of the Model Context Protocol drops the initialize handshake and Mcp-Session-Id, so any request can land on any server instance.

 Answer card: NVIDIA is investing a reported five billion dollars in Safe Superintelligence and supplying Vera Rubin systems, raising SSI's compute by an order of magnitude and moving the lab off Google TPUs, announced July twenty seventh 2026.

Dev News

NVIDIA Puts $5B Into Safe Superintelligence

NVIDIA takes a reported five billion dollar stake in Ilya Sutskever's lab and gives it Vera Rubin systems, moving SSI off Google TPUs and onto GPUs.

 Answer card: GNU Binutils 2.47 was released on July twenty sixth 2026 by Nick Clifton, adding a linker -O 0 level that stops combining mergeable sections, --start-lib and --end-lib for loose object files, --debug-dir in objdump and readelf, and new RISC-V extensions.

Dev News

GNU Binutils 2.47 Lands With a Faster Linker Setting

Binutils 2.47 is out with an ld -O 0 level that skips mergeable section merging, --start-lib for loose object files, and a batch of new RISC-V extensions.

 Answer card: in July 2026 Foxconn replaced its legacy VMware and SAN architecture with Arcfra hyperconverged software across branch factories in Mainland China, Taiwan, Vietnam and North America, covering intranet, ERP, manufacturing and production line management, DevTest and VDI workloads.

Sysadmin News

Foxconn Drops VMware for a Two Year Old HCI Vendor

Foxconn replaced VMware and SAN storage across factories in China, Taiwan, Vietnam and North America with hyperconverged software from Arcfra, a company founded in 2024.

 Answer card: Paolo Bonzini merged the kvm-chainsaw branch into KVM's next tree in July 2026, splitting struct kvm_mmu into kvm_pagewalk for walking guest page tables, kvm_mmu for building shadow pages, and kvm_page_format for operating on existing PTEs, targeting Linux 7.3.

Sysadmin News

KVM Splits Its God Struct Ahead of Linux 7.3

Paolo Bonzini merged the kvm-chainsaw branch, breaking struct kvm_mmu into three. No new feature, but a large piece of nested virtualization confusion goes away.

 Answer card: Shopify's successor to the Horizon storefront theme has 93 percent fewer lines of code, replacing JSON heavy configuration with HTML interpolated with Liquid, adding a composable block tag with typed parameters and a partial tag for server rendered regions, both in developer preview in July 2026.

Dev News

Shopify Rebuilt Its Theme Layer With 93% Less Code

Shopify's next storefront theme drops JSON heavy configuration for HTML and Liquid, cutting code by 93 percent. The reason given is that AI agents read HTML better.

 Answer card: Linux 7.2-rc5 was released on July 26 2026 with more than 35 percent of its changes in the networking subsystem, mostly drivers, which Torvalds attributed to a conference backlog clearing, with the 7.2 stable release expected on August 16 2026.

Network News

Linux 7.2-rc5 Is Big, and a Third of It Is Networking

Linux 7.2-rc5 landed on July 26 with over 35% of its changes in networking drivers. Torvalds calls it too big but not scary. Stable targets August 16.

 Answer card: NVIDIA is reported to be in talks to guarantee about 250 billion dollars of lease and construction debt so OpenAI can lease SB Energy's planned 10 gigawatt PORTS Technology Campus in Piketon, Ohio, a project whose total cost including chips could exceed 500 billion dollars.

Sysadmin News

NVIDIA Weighs a $250B Backstop for OpenAI's Ohio Campus

NVIDIA is reportedly in talks to guarantee $250 billion so OpenAI can lease SoftBank's 10 GW Piketon campus. The structure matters more than the number.

 Answer card: Anthropic released Claude Opus 5 on July twenty fourth at five dollars per million input tokens and twenty five per million output tokens, half the price of Fable 5, scoring 43.3 percent on Frontier-Bench v0.1 against 33.7 percent for Fable 5.

Dev News

Claude Opus 5 Lands at Half the Price of Fable 5

Anthropic shipped Claude Opus 5 on July 24 at five dollars per million input tokens, half what Fable 5 costs, and it wins several published benchmarks.

 Answer card: Debian opened the discussion period on July twenty fourth 2026 for a General Resolution on LLM usage, with four ballot options ranging from a Social Contract ban proposed by Matthias Geiger to conditional acceptance proposed by Lucas Nussbaum, Ian Jackson and Pierre-Elliott Becue.

Dev News

Debian Votes Again on LLM Written Contributions

Four competing proposals, from an outright ban to conditional acceptance, went into discussion on July 24. Whatever Debian picks, derivatives will copy it.

 Answer card: glibc 2.44, released July twenty fifth 2026, introduces /etc/tunables.conf for system wide tunables as an alternative to the GLIBC_TUNABLES environment variable, adds a transparent huge pages tunable for read only executable segments, and speeds up cosh by roughly 35 percent.

Sysadmin News

glibc 2.44 Adds /etc/tunables.conf for System Wide Tuning

Released July 25, glibc 2.44 lets you set tunables in a config file instead of an environment variable, plus a THP switch and faster math.

 Answer card: on July twenty second 2026 a transmission line fault in Ashburn Virginia caused roughly 3 gigawatts of data center load, about three percent of PJM demand, to transfer to backup power within seconds, taking around ten minutes to stabilise with no customer outages.

Sysadmin News

One Line Fault Dropped 3 GW of Data Center Load in Virginia

A transmission fault in Ashburn sent about 3 GW of data centers to backup power in seconds. Nobody lost power, and that is exactly what worries grid operators.

 Answer card: a July twenty fourth 2026 letter titled Open Weights and American AI Leadership was signed by twenty five companies including NVIDIA, Microsoft and Meta, doubled to roughly fifty signatories within a day with OpenAI and Google joining, and asks US policymakers to avoid broad restrictions on downloadable model weights.

Dev News

Fifty Companies Sign an Open Weights Letter to Washington

NVIDIA, Microsoft, Meta and dozens more asked US policymakers not to restrict downloadable model weights. The signatory list doubled in a day and OpenAI joined.

 Answer card: on July twenty fourth 2026 Ubuntu developer Benjamin Drung proposed removing /etc/debian_version from base-files, targeting Ubuntu 26.10, closing a Launchpad bug open since 2005, with /etc/os-release as the replacement.

Sysadmin News

Ubuntu Moves to Delete /etc/debian_version in 26.10

A twenty year old Launchpad bug is finally getting closed. If your scripts read /etc/debian_version to detect the distribution, now is the time to fix them.

 Answer card: on July twenty third, Black Forest Labs released FLUX 3, a single multimodal model covering image, video with native audio up to twenty seconds, and robot action prediction, with FLUX 3 Video and Action in early access and an open weight FLUX 3 Dev due later in 2026.

Dev News

FLUX 3 Puts Image, Video, Audio and Robotics in One Model

Black Forest Labs launched FLUX 3, one set of weights that generates images, 20 second video with native audio, and robot actions. Open weights come later in 2026.

 Answer card: on July twenty fourth, Greg Kroah-Hartman released seven stable Linux kernels at once, 7.1.5, 6.18.40, 6.12.97, 6.6.145, 6.1.178, 5.15.212 and 5.10.261, with over 2,000 patches in the 7.1.5 candidate and 1,611 in the 6.18.40 candidate.

Sysadmin News

Seven Stable Linux Kernels Shipped in One Day

Greg Kroah-Hartman released seven stable Linux kernels on July 24, from 5.10.261 up to 7.1.5, one of them carrying over 2,000 patches. Here is how to stage it.

 Answer card: on July twenty third, reports said Stripe is in talks to acquire OpenRouter for close to 10 billion dollars, about eight times the 1.3 billion dollar valuation OpenRouter set in May, with no deal signed and talks that could still fall apart.

Dev News

Stripe in Talks to Buy OpenRouter for About $10 Billion

Stripe is reportedly in talks to acquire OpenRouter for close to $10 billion, roughly eight times the model routing startup's $1.3 billion valuation from May.

 Answer card: on July twenty third Apple announced MapKit for Automotive, an SDK that lets carmakers embed Apple Maps as native in car navigation without CarPlay, with Ford's Universal EV Platform as the first adopter, shipping in 2027 on a vehicle priced around $30,000.

Dev News

Apple Opens MapKit for Automotive, Ford Ships It First

Apple announced MapKit for Automotive, an SDK that puts Apple Maps in the car as native navigation without CarPlay. Ford's 2027 EV platform is the first user.

 Answer card: Intel Q2 2026 results announced July twenty third, total revenue $16.1 billion, data center and AI revenue $6.3 billion up 59% year over year, non-GAAP gross margin 41.8%, and 2026 capital expenditure guidance raised above $20 billion.

Sysadmin News

Intel Data Center Revenue Grows 59% on Xeon 6 Demand

Intel posted $16.1B in Q2 2026 revenue, with data center and AI up 59% to $6.3B on Xeon 6. Demand now outpaces supply, which changes how you plan a refresh.

 Answer card: on July twenty fourth Qualcomm told customers that chip prices rise by a double digit percentage for shipments after September first, 2026, citing supplier costs it can no longer absorb and a shortage of alternative vendors caused by AI data center demand on component capacity.

Sysadmin News

Qualcomm Raises Chip Prices by Double Digits in September

Qualcomm told customers on July 24 that chip prices rise by a double digit percentage for shipments after September 1, blaming supplier costs it can no longer absorb.

 Answer card: at Advancing AI 2026 on July twenty third, AMD launched the Instinct MI400 series GPUs, sixth generation EPYC Venice CPUs on a two nanometer process, the ROCm open software stack, and the Helios rack that combines seventy two MI455X GPUs with Venice CPUs and Pensando networking.

Network News

AMD Launches MI400 GPUs and EPYC Venice at Advancing AI

At Advancing AI 2026 on July 23, AMD launched its Instinct MI400 GPUs, EPYC Venice CPUs, and the Helios rack, with Anthropic committing to up to 2 gigawatts.

 Answer card: Anthropic updated Claude voice mode on July twenty third so users can choose Opus, Sonnet, or Haiku, with the picker starting from the last model used in text chat and connections to Gmail, Google Calendar, Slack, Canva, and Notion.

Dev News

Claude Voice Mode Adds Opus and Sonnet, Not Just Haiku

Anthropic updated Claude voice mode on July 23 so you can pick Opus, Sonnet, or Haiku, with voice actions in Gmail, Calendar, Slack, Canva, and Notion.

 Answer card: on July twenty third, AMD and Cerebras announced a disaggregated inference partnership, pairing AMD Helios racks for high throughput with the Cerebras Wafer-Scale Engine for fast token generation, claiming up to five times tokens per second per watt, a modelled figure, available first on Cerebras Cloud in the second half of 2026.

Sysadmin News

AMD and Cerebras Split AI Inference Across Two Chips

AMD and Cerebras will pair Helios racks with the Wafer-Scale Engine for disaggregated inference, claiming up to 5x tokens per watt, a modelled figure, in late 2026.

 Answer card: on July twenty third, Etched raised 300 million dollars at a 10.3 billion dollar valuation in a Series C led by Sequoia, to scale Sohu, its transformer only inference chip, with first rack shipments due in summer 2026.

Sysadmin News

Etched Raises $300M at $10.3B to Scale Its Sohu Chip

Etched raised $300 million at a $10.3 billion valuation to scale Sohu, its transformer-only inference chip, in a round led by Sequoia with a16z and SK hynix.

 Answer card: Anthropic shipped Record a Skill in Claude Cowork on July twenty first, a feature that turns a narrated screen recording of a task into a reusable Skill, available on the Pro, Max, and Team plans from the plus menu of the Claude desktop app.

Dev News

Claude Cowork Turns Screen Recordings Into Reusable Skills

Anthropic shipped Record a Skill in Claude Cowork on July 21. Screen record a task once, narrate it, and Claude turns the demo into a reusable Skill.

 Answer card: Block released Buzz on July twenty first, a free Apache 2.0 open source workspace built on the Nostr protocol where humans and AI agents share channels, code repositories, and their own portable cryptographic identities.

Dev News

Block Launches Buzz, an Open Source Slack and GitHub Rival

Block released Buzz on July 21, a free Apache 2.0 open source workspace built on Nostr where humans and AI agents share channels, code, and portable identity.

 Answer card: NVIDIA announced Spectrum-6 on July 21, 2026, a 102.4 Tbps Ethernet switch for the Vera Rubin platform, doubling capacity and holding 95 percent efficiency past 100,000 GPUs.

Network News

NVIDIA Spectrum-6: 102.4 Tbps Ethernet for AI Factories

NVIDIA launched Spectrum-6, a 102.4 Tbps Ethernet switch for the Vera Rubin platform that doubles capacity and holds 95 percent efficiency past 100,000 GPUs.

 Answer card: OpenAI announced Project Camellia on July 22, 2026, a 3.2 gigawatt data center in Effingham County, Georgia, on a 25 year Georgia Power deal with up to 1,000 MW of demand response.

Sysadmin News

OpenAI's Project Camellia: a 3.2 GW Data Center in Georgia

OpenAI unveiled Project Camellia, a 3.2 gigawatt data center in Effingham County, Georgia, on a 25 year Georgia Power deal with up to 1,000 MW of demand response.

 Answer card: OpenAI launched Presence on July 22, 2026, a limited availability platform for deploying voice and chat AI agents with policies, guardrails, simulations, and a Codex driven evaluation loop.

Dev News

OpenAI Presence Puts Enterprise AI Agents Behind Guardrails

OpenAI launched Presence, a limited availability platform for deploying voice and chat AI agents with policies, guardrails, simulations, and Codex driven evaluation.

 Answer card: Google released Gemini 3.6 Flash on July twenty first, a cheaper and more token efficient Flash model for agentic coding that uses about seventeen percent fewer output tokens than 3.5 Flash and is rolling out in GitHub Copilot.

Dev News

Google Gemini 3.6 Flash Lands in Copilot, 17% Fewer Tokens

Google released Gemini 3.6 Flash on July 21, a cheaper and more token efficient Flash model tuned for agentic coding, now rolling out in GitHub Copilot.

 Answer card: General Compute secured up to $400 million from Upper90 Capital Management on July 17, 2026, starting at $100 million, to build an inference neocloud on SambaNova SN40 and SN50 chips, with the loan backed by inference silicon as collateral.

Network News

General Compute Raises $400M for an Inference Cloud

General Compute secured up to $400M from Upper90 to build an inference neocloud on SambaNova SN40 and SN50 chips, using inference silicon as loan collateral.

 Answer card: Kubernetes v1.37 reached code freeze on July 22, 2026, with general availability on August 26. It requires containerd 2.0 or later, makes cgroup v2 mandatory with the FailCgroupV1 gate defaulting to true, and advances Dynamic Resource Allocation and etcd RangeStream.

Sysadmin News

Kubernetes 1.37 Code Freeze: containerd 2.0 Now Required

Kubernetes v1.37 hit code freeze on July 22, 2026. It requires containerd 2.0, makes cgroup v2 mandatory and ships DRA and etcd RangeStream changes.

 Answer card: on July 21, 2026, OpenAI launched a ChatGPT for small businesses program built on ChatGPT Work, an agent that acts across apps and files, can run for hours and produce finished documents, with partner skills from Dropbox, Shopify, Intuit, Slack, Atlassian and Wix.

Dev News

OpenAI Opens ChatGPT Work to Small Businesses

On July 21, 2026, OpenAI launched a ChatGPT for small businesses program built on ChatGPT Work, an agent that acts across apps and files with partner skills.

 Answer card: Microsoft will deploy AMD Helios rack-scale systems on Azure, combining 72 Instinct MI455X GPUs, EPYC Venice CPUs, Pensando networking, and ROCm software.

Network News

Microsoft Will Run AMD Helios Rack Systems on Azure

Microsoft will deploy AMD Helios rack-scale systems on Azure, pairing Instinct MI455X GPUs, EPYC Venice CPUs, and Pensando networking to serve frontier AI.

 Answer card: Z.AI has begun operating a 1 gigawatt data center built only on Chinese-made chips, training its GLM models on Huawei Ascend hardware and the MindSpore software stack.

Sysadmin News

Z.AI Powers Up a 1 Gigawatt Data Center on Chinese Chips

Z.AI has begun operating a 1 gigawatt data center running only Chinese-made chips, training its GLM models on Huawei Ascend hardware and the MindSpore stack.

 Answer card: Alibaba previewed Qwen3.8 Max, a 2.4 trillion parameter multimodal model it ranks second only to Fable 5, with open weights promised soon.

Dev News

Alibaba Previews Qwen3.8 Max, a 2.4T Parameter Model

Alibaba previewed Qwen3.8 Max, a 2.4 trillion parameter multimodal model it ranks second only to Fable 5, with open weights promised soon.

 Answer card: CXMT priced an 8.6 billion dollar Shanghai IPO, Asia largest of 2026, as the world fourth largest DRAM maker scales up server and AI memory production.

Sysadmin News

China's CXMT Prices an 8.6 Billion Dollar DRAM Memory IPO

CXMT priced an 8.6 billion dollar Shanghai IPO, Asia's largest of 2026, as the world's fourth largest DRAM maker scales up server and AI memory production.

 Answer card: Hut 8 signed a second 15-year, 352 megawatt lease worth 9.8 billion dollars, fully commercializing its 1 gigawatt Beacon Point AI data center campus in Texas.

Network News

Hut 8 Fully Contracts Its 1 Gigawatt Beacon Point AI Campus

Hut 8 signed a second 15-year, 352 MW lease worth 9.8 billion dollars, fully commercializing its 1 gigawatt Beacon Point AI data center campus in Texas.

 Answer card: Cloudflare shipped a wrangler flagship command suite on July 16, 2026, to create feature flags, change defaults, and flip kill switches from the terminal.

Dev News

Cloudflare Puts Feature Flags in the Terminal With Wrangler

Cloudflare's Wrangler CLI now manages Flagship feature flags from the terminal, so you can create flags, flip kill switches, and roll back from CI or a script.

 Answer card: Walden Robotics launched from stealth on July 15, 2026, with about 300 million dollars at a 1.1 billion dollar valuation, co led by Deviation Capital and Toyota.

Dev News

Walden Robotics Exits Stealth With 300 Million for Robots

Walden Robotics launched from stealth with 300 million dollars at a 1.1 billion valuation, and its general purpose robots are already working on a Toyota line.

 Answer card: The European Commission issued binding DMA measures on July 16 2026, ordering Google to open eleven Android features to rival AI assistants and to share anonymized search data.

Dev News

EU Orders Google to Open Android and Search to AI Rivals

The European Commission issued binding DMA measures on July 16, telling Google to open eleven Android features to rival AI assistants and share anonymized search data.

 Answer card: Google renamed NotebookLM to Gemini Notebook on July 16 2026 and added a secure cloud computer that writes and runs code grounded in your own sources.

Dev News

NotebookLM Is Now Gemini Notebook, With a Cloud Computer

Google renamed NotebookLM to Gemini Notebook on July 16 and gave every notebook a secure cloud computer that writes and runs code against your own sources.

 Answer card: SAP has completed its acquisition of Prior Labs, the German lab behind the TabPFN tabular foundation models, backing a European frontier AI lab with more than one billion euros over four years.

Dev News

SAP Buys Prior Labs to Lead Tabular Foundation Models

SAP has completed its acquisition of Prior Labs, the German lab behind TabPFN, backing a European frontier AI lab with more than one billion euros over four years.

 Answer card: for part of Friday July 17, 2026, Apple passed Nvidia to become the world most valuable company at about 4.88 trillion dollars.

Dev News

Apple Overtakes Nvidia as World's Most Valuable Company

For part of Friday July 17, 2026, Apple passed Nvidia as the world's most valuable company near 4.9 trillion dollars. What the crown swap means.

 Answer card: Japan FRONTia national AI factory will run 27,500 Nvidia Rubin GPUs at 140 megawatts to train domestic robotics foundation models.

Network News

Japan Builds World's First National AI Factory With Nvidia

Japan's FRONTia project puts 27,500 Nvidia Rubin GPUs in a 140 MW national AI factory to train robotics models. Inside the Noetra plan.

 Answer card: Equinix has topped out the next phase of its MU4 data center near Munich, a site that will reach 13,608 square meters across four floors at full build out.

Network News

Equinix Tops Out Its MU4 Data Center Expansion in Munich

Equinix has topped out its MU4 expansion in Munich, adding room for thousands more cabinets at one of Germany's key interconnection metros.

 Answer card: Spectro Cloud raised more than 100 million dollars in a Series D led by Goldman Sachs Alternatives to help teams run production AI on Kubernetes across clouds.

Sysadmin News

Spectro Cloud Raises 100 Million for Kubernetes AI

Spectro Cloud raised more than 100 million dollars in a Series D led by Goldman Sachs to help teams put AI on Kubernetes into production across clouds.

 Answer card: Google has delayed Gemini 3.5 Pro after the model missed internal targets on coding and long horizon reasoning, pushing the flagship model months past its June launch date.

Dev News

Google Delays Gemini 3.5 Pro Over Coding and Reasoning Gaps

Google has delayed Gemini 3.5 Pro after the model missed internal targets on coding and long horizon reasoning, pushing the flagship months past its June date.

 Answer card: Thinking Machines released Inkling, a 975 billion parameter open weight mixture of experts model with 41 billion active parameters, a 1 million token context, and open weights on Hugging Face.

Dev News

Thinking Machines Ships Inkling, a Leading US Open Model

Thinking Machines released Inkling, a 975 billion parameter open weight MoE with 41B active, a 1M token context, and weights on Hugging Face under an open license.

 Answer card: Anthropic is in early talks to lease as much as 10 billion dollars of computing power from Meta over two years, according to a July 2026 New York Times report.

Sysadmin News

Anthropic in Talks to Lease 10 Billion in Compute From Meta

Anthropic is in early talks to lease as much as 10 billion dollars of compute from Meta over two years. What Meta Compute means for the cloud market.

 Answer card: Fireworks AI closed a 1.5 billion dollar Series D at a 17.5 billion dollar valuation on July 16, 2026, led by Atreides Management, Index Ventures, and TCV.

Dev News

Fireworks Raises 1.5 Billion Series D for Inference

Fireworks AI closed a 1.5 billion dollar Series D at a 17.5 billion valuation. Why specialized open model inference is the story developers should read.

 Answer card: PostgreSQL 19 Beta 2 was released on July 16, 2026, adding the REPACK command that replaces VACUUM FULL and CLUSTER, native SQL/PGQ property graph queries, JIT disabled by default and a default TOAST compression change from pglz to lz4, with general availability expected around September or October 2026.

Sysadmin News

PostgreSQL 19 Beta 2: REPACK, Graphs and New Defaults

PostgreSQL 19 Beta 2 shipped on July 16, 2026, bringing the REPACK command, SQL/PGQ property graphs, JIT off by default and lz4 TOAST compression.

 Answer card: Moonshot AI released Kimi K3, a 2.8 trillion parameter open mixture of experts model with a 1M token context, thinking mode, and open weights due July 27.

Dev News

Moonshot Releases Kimi K3, the Largest Open Model Yet

Moonshot AI shipped Kimi K3, a 2.8 trillion parameter open MoE model with a 1M token context and thinking mode, with open weights due July 27.

 Answer card: Anthropic bankers at Goldman Sachs, Morgan Stanley and JPMorgan are scheduling investor meetings ahead of a possible October 2026 listing, following a confidential SEC filing and a 965 billion dollar private valuation in May.

Dev News

Anthropic Lines Up Investor Meetings Ahead of an IPO

Bankers at Goldman Sachs, Morgan Stanley and JPMorgan are scheduling investor meetings for Anthropic, pointing to a listing as soon as October 2026.

 Answer card: China's Cyberspace Administration approved Apple Intelligence on July 15, 2026, with Alibaba's Qwen model powering the features across iOS, iPadOS, macOS and visionOS.

Dev News

Apple Intelligence Clears China With Alibaba's Qwen

China's Cyberspace Administration approved Apple Intelligence on July 15, 2026, on the back of a deal to run Alibaba's Qwen model inside iOS, iPadOS, macOS and visionOS.

 Answer card: Emergent raised a 130 million dollar Series C led by Creaegis at a 1.5 billion dollar valuation on July 15, 2026, with 120 million dollars in annual run rate revenue and over 200,000 paying customers.

Dev News

Emergent Raises 130M at 1.5B for AI App Building

Emergent, an Indian AI coding platform launched in June 2025, raised a 130 million dollar Series C at a 1.5 billion valuation with 120 million in run rate revenue.

 Answer card: Apple released the iOS 27 public beta on July 13, 2026 with the redesigned AI Siri, which reaches third party apps only through App Intents after SiriKit was deprecated at WWDC on June 9, 2026, ahead of a September 14 public release.

Dev News

Apple Opens Its New AI Siri to Everyone in the iOS 27 Beta

Apple released the iOS 27 public beta on July 13, 2026, putting the redesigned AI Siri in front of everyone. For developers, App Intents is now the only way in.

 Answer card: etcd v3.7.0 shipped in early July 2026 with RangeStream for chunked large query results, keys only range requests, faster lease renewal and a v3 only startup path, lowering etcd CPU use for Kubernetes clusters compared with version 3.6.

Sysadmin News

etcd 3.7 Lands: Streamed Ranges and Lower Kubernetes CPU

etcd v3.7.0 shipped in early July 2026 with RangeStream, keys only queries and a lighter startup path, cutting etcd CPU use for Kubernetes clusters versus 3.6.

 Answer card: TYLsemi exited stealth on July 14, 2026 with a 43 million dollar early stage round led by Matter Venture Partners for a full stack chiplet platform, with TYL.IO and TYL.Power samples due to qualified customers in 2027 through TSMC.

Network News

TYLsemi Raises 43M to Ship Custom AI Silicon via Chiplets

TYLsemi left stealth on July 14, 2026 with a 43 million dollar round and a full stack chiplet platform for custom AI silicon, with TSMC samples due in 2027.

 Answer card: New York paused state environmental permits for new data centers of 50 megawatts or more for up to one year, under an executive order signed July 14, 2026.

Sysadmin News

New York Halts New Hyperscale Data Centers for a Year

Governor Hochul signed an executive order pausing state environmental permits for new data centers of 50 megawatts or more, for up to one year.

 Answer card: Reflection AI signed a compute deal worth over 1 billion dollars with Nebius, running through 2029 with access to Nvidia GB300 chips for training open weight models.

Dev News

Reflection Signs 1 Billion Dollar Nebius Compute Deal

Reflection AI signed a compute deal worth over 1 billion dollars with Nebius, running through 2029 and giving it access to Nvidia GB300 chips to train open models.

 Answer card: Tower Semiconductor is investing about 3 billion dollars in 300mm silicon photonics and silicon germanium capacity in Japan, net of roughly 1 billion dollars in government grants.

Network News

Tower Puts 3 Billion Dollars Into Japan for Optical Chips

Tower Semiconductor is investing about 3 billion dollars in Japan for 300mm silicon photonics and silicon germanium, backed by roughly 1 billion in grants.

 Answer card: ASML reported 9.3 billion euros of net sales in the second quarter of 2026 and raised its full year outlook to between 43 and 45 billion euros.

Sysadmin News

ASML Lifts 2026 Outlook as Intel Ships High NA EUV Chips

ASML reported 9.3 billion euros of Q2 net sales and raised its 2026 outlook to 43 to 45 billion euros, as Intel became the first to ship logic made with High NA EUV.

 Answer card: Linux 7.2 adds cache aware scheduling, enabled with CONFIG_SCHED_CACHE and toggled at runtime through the llc_balancing debugfs knob.

Sysadmin News

Linux 7.2 Adds Cache Aware Scheduling for Big Server CPUs

Linux 7.2 reached rc3 on July 12, 2026, carrying cache aware scheduling, an Intel led feature that keeps tasks sharing data on the same last level cache.

 Answer card: Rakuten Mobile completed its nationwide deployment of 1Finity Open RAN radio units in May 2026 and plans around 3,000 massive MIMO radios at 3.7 GHz.

Network News

Rakuten Mobile Finishes Nationwide Open RAN Radio Rollout

Rakuten Mobile has deployed 1Finity Open RAN radios across its nationwide 5G network in Japan, with a further 3,000 massive MIMO units planned at 3.7 GHz.

 Answer card: Intel is investing 5 billion euros in its Leixlip campus in Ireland to scale Xeon 6 and next generation Xeon on the Intel 3 node, after regaining full control of Fab 34.

Sysadmin News

Intel Puts 5 Billion Euros Into Ireland for More Xeon

Intel is investing 5 billion euros in its Leixlip campus in Ireland to scale Xeon 6 and next gen Xeon on the Intel 3 node, after buying back full control of Fab 34.

 Answer card: Meta will move its fourth generation MTIA chip, Iris, into production in September 2026, designed with Broadcom and built by TSMC, to double compute and reduce reliance on Nvidia and AMD.

Sysadmin News

Meta Moves Its Iris AI Chip Into Production in September

An internal memo says Meta will put its fourth generation MTIA chip, Iris, into production in September 2026 to double compute and lean less on Nvidia and AMD.

 Answer card: OpenAI shipped the GPT-5.6 family, Sol, Terra, and Luna, alongside ChatGPT Work, a desktop agent with Codex built in that turns a goal into finished work.

Dev News

OpenAI Ships GPT-5.6 and ChatGPT Work, a Desktop Agent

OpenAI released the GPT-5.6 family (Sol, Terra, Luna) plus ChatGPT Work, a desktop agent with Codex built in that turns a goal into finished docs, sheets, and code.

 Answer card: Cloudflare Monetization Gateway uses the x402 protocol and the HTTP 402 status code to let sites charge AI agents per request for pages, APIs, datasets and MCP tools, settled in stablecoins.

Network News

Cloudflare Charges AI Agents Per Request via HTTP 402

Cloudflare's new Monetization Gateway uses the x402 protocol and HTTP 402 to let any site charge callers per request for pages, APIs, datasets and MCP tools.

 Answer card: Mistral Leanstral 1.5 is an open weights Apache 2.0 model for Lean 4 formal verification that solved 587 of 672 PutnamBench problems and found 5 unknown bugs across 57 real repositories.

Dev News

Mistral Open Sources Leanstral 1.5 for Lean 4 Proofs

Mistral released Leanstral 1.5, an open weights Apache 2.0 model for Lean 4 that proves code correct and found 5 unknown bugs across 57 real repositories.

 Answer card: Meta will spend about 10 billion dollars on a Sturgeon County Alberta data center drawing near 1 gigawatt, scalable to 1.8 gigawatts, its 33rd worldwide.

Sysadmin News

Meta Bets 10 Billion Dollars on a 1 GW Alberta Data Center

Meta will spend about 10 billion dollars on its first Canadian data center in Alberta, drawing near 1 gigawatt. Why power, not chips, now sets the pace.

 Answer card: SambaNova closed the first part of a 1 billion dollar Series F at an 11 billion dollar valuation led by General Atlantic to scale on premises AI inference.

Dev News

SambaNova Raises 1B at 11B to Challenge Nvidia on Inference

SambaNova closed the first part of a 1 billion dollar Series F at an 11 billion valuation to scale on premises AI inference. Why the anti Nvidia bet grew.

 Answer card: SK Hynix raised 26.5 billion dollars in the biggest foreign US IPO ever, pricing 177.9 million ADRs at 149 dollars to fund HBM and fab expansion.

Sysadmin News

SK Hynix 26.5B Nasdaq Debut Bets Big on AI Memory

SK Hynix raised 26.5 billion dollars on Nasdaq, the biggest foreign US IPO ever, to fund HBM and fab expansion. What it means for AI memory supply.

 Answer card: Qwen 3.7 open weights are not out yet, so run the newest open Qwen 3.6 with Ollama today using ollama run qwen3.6, pick a size for your VRAM, and swap the tag to qwen3.7 when the open weights arrive.

Dev Guide

How to Run Qwen 3.7 Locally with Ollama (2026)

How to run Qwen locally in 2026: Qwen 3.7 open weights are not out yet, so we set up the newest open Qwen with Ollama, by size, with a one-tag swap for 3.7.

 Answer card for the awk cheatsheet: print columns with $1 and $NF, change the field separator with -F, filter rows by pattern, sum a column, and run BEGIN and END blocks.

Dev Guide

The awk Cheatsheet: Process Text in Columns

A practical awk cheatsheet: print columns with $1 and $NF, set field separators with -F, filter rows by pattern, sum a column, and use BEGIN and END blocks.

 Answer card for the dig and nslookup cheatsheet: query A and AAAA records, MX, TXT, NS and CNAME, trim with +short, trace from the root with +trace, ask @8.8.8.8, and reverse lookup with dig -x.

Network Guide

dig and nslookup Cheatsheet: Query DNS Fast

A practical dig and nslookup cheatsheet: look up A, AAAA, MX, TXT, NS and CNAME records, trim noise with +short, trace from the root with +trace, and query @8.8.8.8.

 Answer card for the everyday Docker commands: run a container, list with ps, read logs, exec into a shell, bring a stack up with compose, and prune to reclaim disk.

Sysadmin Guide

Docker Commands Cheatsheet: The Everyday Ones

A practical Docker cheatsheet: run a container with docker run, list with ps, follow logs, exec into a shell, bring a stack up with compose, and prune disk.

 Answer card for the everyday git cheatsheet: check status, stage and commit, branch and switch, and undo work with restore, reset, revert, stash and reflog.

Dev Guide

The Git Cheatsheet: Everyday Commands and Quick Fixes

A practical git cheatsheet: check status, stage and commit, switch branches, and get out of trouble with reset, restore, revert, stash and reflog.

 Answer card for the sed command cheatsheet: substitute with s slash old slash new slash g, edit in place with -i and a backup, delete lines with d, and print specific lines with -n p.

Dev Guide

The sed Command Cheatsheet: Substitute and Delete

A practical sed cheatsheet: substitute with s/old/new/g, edit files in place with -i and a backup, delete lines, and print specific lines with -n p.

 Answer card: Anthropic disabled Claude Fable 5 and Mythos 5 worldwide on June 12 2026 after a US government export-control order, with Opus 4.8 the live fallback.

Dev News

Anthropic Suspends Claude Fable 5 and Mythos 5

Anthropic disabled Claude Fable 5 and Mythos 5 worldwide after a US government order. The timeline, the trigger, and how to fall back to Opus 4.8 fast.

 Answer card: AI in cybersecurity in 2026 is a dual-use force multiplier, the same capability helping defenders triage and attackers exploit.

Security

AI in Cybersecurity 2026: Real vs Hype, Both Sides

AI in cybersecurity in 2026: what it really does for defenders (triage, summarization, code review), what attackers do with it, and the dual-use problem.

 Answer card: most of the bug bounty skill you need is sysadmin DNA already, and the report is what gets paid.

Security

Bug Bounty Starter Guide for Sysadmins

A bug bounty starter guide for sysadmins: how your DNS, HTTP and Linux skills transfer, the five free tools I open, and the report shape that gets paid.

 Answer card: run a capable local AI agent with Ollama and Qwen 2.5, install on Windows, Linux or macOS, pick the model size by VRAM, call it from Python and LangChain.

Dev Guide

Build a Local AI Agent with Ollama + Qwen 2.5

How I run a local AI agent with Ollama and Qwen 2.5 in 2026: install on Windows, Linux or macOS, pick the model your VRAM fits, call it from Python and LangChain.

 Answer card for migrating off end-of-life CentOS 7 or 8 to Rocky Linux 9 or AlmaLinux 9: two routes, in-place ELevate or fresh install, with a mandatory pre-flight inventory.

Sysadmin Guide

CentOS to Rocky Linux 9 Migration Playbook 2026

CentOS to Rocky Linux 9 migration, end to end: the in-place ELevate route, the fresh-install route, the pre-flight inventory, and the breaks that fail silently.

 Answer card comparing ChatGPT, Claude and Gemini in 2026, with no single winner because the best model depends on the job.

Dev

ChatGPT vs Claude vs Gemini 2026

A hands-on ChatGPT vs Claude vs Gemini comparison for 2026, ten real jobs tested through the APIs: code, research, writing, data, vision, cost and latency.

 Answer card for the chmod and chown cheatsheet: chmod +x as the Permission denied fix, 755 and 644 as the everyday modes, chmod 600 for secrets, chown -R for ownership, and read 4 write 2 execute 1.

Sysadmin Guide

The chmod and chown Cheatsheet, Decoded

A practical Linux chmod and chown cheatsheet: the Permission denied fix with chmod +x, why 755 and 644 keep showing up, chown for ownership, and recursing safely.

 Answer card comparing Claude Fable 5 and Opus 4.8: new Mythos-class tier above Opus, 95.0% vs 88.6% on SWE-bench Verified, exactly 2x the price.

Dev

Claude Fable 5 vs Opus 4.8: One Day In

Claude Fable 5 vs Opus 4.8 after a mid-session swap on launch day: 95.0% vs 88.6% SWE-bench, exactly 2x the price, and the safety routing caveat.

 Answer card for choosing a Linux distribution in 2026: weigh team skills, compliance, app stack and support model in order, then fall through to Ubuntu 24.04 LTS.

Sysadmin

Choosing a Linux Distribution in 2026: Decision Guide

Choosing a Linux distribution in 2026 without the tribal noise: four inputs that decide (team skills, compliance, app stack, support) plus honest distro profiles.

 Answer card for Core Web Vitals 2026: LCP under 2.5 seconds, INP under 200 milliseconds and CLS under 0.1, all judged at the 75th percentile over a rolling 28 days.

SEO

Core Web Vitals 2026: LCP, INP and CLS Mastery

Master Core Web Vitals in 2026: what LCP, INP and CLS really measure, lab vs field data, the fixes that still hold up, plus budgets and a weekly workflow.

 Answer card for building a CTF lab on Hyper-V: three trust-segmented virtual switches feeding a Kali attacker, pfSense, Metasploitable3, a broken Windows 10 and DVWA.

Sysadmin Guide

Build a CTF Lab on Hyper-V: Full Walkthrough

Build a CTF lab on Hyper-V: three trust-segmented virtual switches, a Kali attacker, Metasploitable3 and a broken Windows 10, with pfSense in the middle for routing.

 Answer card for the curl cheatsheet: download and keep the remote name with curl -O, follow redirects with -L, fetch headers only with -I, and POST JSON with -d.

Dev Guide

curl Cheatsheet: Download Files and Test APIs

A practical curl cheatsheet: download and keep the remote name with curl -O, follow redirects with -L, fetch headers only with -I, and POST JSON with -d.

 Answer card for DNS over HTTPS: lookups wrapped in TLS 1.3 on port 443, native on Windows, Linux and macOS, self-hosted with unbound plus dnsdist.

Network Guide

DNS over HTTPS Implementation Guide

DNS over HTTPS the way I roll it out: what DoH buys you (and what it does not), flipping it on for Windows, Linux and macOS, plus self-hosting and edge enforcement.

 Answer card: an ESXi host Not Responding in vCenter is a dead management link, not a dead host. Restart hostd then vpxa, free a full log partition, check ports 902 and 443, then reconnect.

Sysadmin Guide

Fix: ESXi Host Not Responding in vCenter

ESXi host Not Responding in vCenter is almost always a dead management link, not a dead host. Restart hostd then vpxa, clear the log partition, check ports 902/443.

 Answer card for the Linux find command cheatsheet: find by name, by type, by size, by time, delete matches, and run a command on each result with -exec.

Dev Guide

The find Command Cheatsheet: Recipes You Actually Use

A practical Linux find cheatsheet: find by -name, big files with -size +100M, recent ones with -mtime, delete with -delete, and run -exec on each hit.

 Answer card comparing git rebase and merge: merge preserves history with a two-parent commit, rebase rewrites it into a straight line.

Dev Guide

Git Rebase vs Merge: A Visual Workflow Guide

Git rebase vs merge, decided in one mental model and five real situations: branch diagrams before and after, the exact commands, and the rule I never break.

 Answer card for the Linux grep cheatsheet: search one file with grep pattern file, search a tree with grep -rn, ignore case with -i, invert with -v, and choose -E or -F.

Dev Guide

The grep Cheatsheet: Search a File, Search a Tree

A practical Linux grep cheatsheet: search one file with grep pattern file, search a whole tree with grep -rn, ignore case with -i, invert with -v, and pick -E or -F.

 Answer card for fixing 'the hypervisor is not running' in Hyper-V: five gates in order, BIOS virtualization, the feature, hypervisorlaunchtype, conflicts, then services.

Sysadmin Guide

Hyper-V: The Hypervisor Is Not Running, Fix Guide

Fix Hyper-V 'the hypervisor is not running' by working the five gates in order: BIOS virtualization, the feature, hypervisorlaunchtype, conflicts, services.

 Answer card for image optimization in 2026: serve AVIF first through picture, a four-width responsive srcset, lazy-load everything but the hero, compress to the lowest quality you cannot see, and pin width and height.

SEO Guide

How I Optimize Images for Website Speed in 2026

Image optimization techniques for 2026: why AVIF goes first with WebP and JPEG behind it, responsive srcset, the lazy-load plus LCP trap, compression, and CDN automation.

 Answer card: keep INP under 200 milliseconds at the 75th percentile, the good threshold for the Core Web Vital that replaced FID.

SEO

INP Optimization 2026: Fix Interaction to Next Paint

A hands-on INP optimization guide for 2026: the twelve Interaction to Next Paint killers I keep finding in audits, how to profile them, and a real 480ms to 120ms fix.

 Answer card mapping iptables to nftables: list rules, allow SSH, default drop, persist, and translate.

Network Guide

iptables vs nftables: A Linux Firewall Cheatsheet

iptables vs nftables, side by side: list rules, allow SSH on dport 22, default drop policy, persist to rules.v4 or nftables.conf, convert with iptables-translate.

 Answer card for the Linux firewall comparison: iptables, nftables, firewalld and ufw all write rules to one nf_tables kernel backend in 2026.

Network

Linux Firewall Comparison 2026: ufw, nftables, iptables

Linux firewall comparison for 2026: iptables, nftables, firewalld and ufw all poke one kernel. Per-distro defaults, the same rule four ways, plus my honest pick.

 Answer card: 32 sysctl hardening toggles grouped into network, kernel, filesystem and process plus BPF plus modules, sorted by criticality.

Security Guide

Linux Kernel Hardening: sysctl Checklist

Linux kernel hardening with sysctl: the 32 toggles I actually ship, grouped by subsystem and sorted by how much each one matters, plus a drift check.

 Answer card mapping deprecated net-tools commands to their iproute2 replacements: ifconfig to ip a, netstat -tulpn to ss -tulpn, route to ip route, arp to ip neigh.

Network Guide

Linux Networking Commands: ip and ss Cheatsheet

ifconfig and netstat are gone on most modern Linux installs. The iproute2 replacements you need: ip a, ss -tulpn, ip route, ip neigh, and a clean old-to-new map.

 Answer card comparing a matched MikroTik RouterOS stack against a Ubiquiti UniFi stack for a prosumer home network, both around 400 EUR.

Network

MikroTik vs Ubiquiti for Home Networks (2026)

MikroTik vs Ubiquiti for a prosumer home network: matched stacks under 400 EUR, CLI vs UI, real routing protocols, Wi-Fi roaming, VPN, a 3-year cost breakdown.

 Answer card for mobile optimization in 2026: mobile is the default Google ranks, the three Core Web Vitals targets (LCP under 2.5s, INP under 200ms, CLS under 0.1) at the 75th percentile, and the usual culprits.

SEO Guide

Mobile Optimization 2026: Fast and Findable on Phones

Mobile optimization in 2026: the Core Web Vitals targets for mobile (LCP under 2.5s, INP under 200ms, CLS under 0.1), what slows a phone, and how to test like one.

 Answer card: five Linux network stacks in 2026, netplan, ifupdown, NetworkManager, systemd-networkd and wicked, doing the same static IP job across seven distros.

Network

Network Config Across Linux Distros in 2026

Network config across Linux distros in 2026: netplan, ifupdown, NetworkManager, systemd-networkd and wicked compared, with the static IP recipe for each.

 Answer card for the nmcli cheatsheet: scan Wi-Fi with nmcli device wifi list, join with nmcli device wifi connect SSID password, show saved profiles, and set a static IP with ipv4.method manual.

Network Guide

nmcli Cheatsheet: Manage Wi-Fi From the Terminal

A practical nmcli cheatsheet for NetworkManager: scan and connect to Wi-Fi, list saved connections, bring them up and down, check device status, and set a static IP.

 Answer card comparing pfSense CE 2.7 and OPNsense 24.7 for a home network: same FreeBSD core and protocols, different release cadence, UI, and plugin ecosystem.

Network

pfSense vs OPNsense for Home Networks (2026)

pfSense vs OPNsense for home networks, run side by side on one N100 mini-PC for years: UI, update cadence, plugins, real benchmarks, appliances, and which I pick.

 Answer card for the PowerShell networking cheatsheet: Test-NetConnection with -Port to check a port, Get-NetIPConfiguration for IP and DNS, Get-NetTCPConnection for listening ports, Resolve-DnsName for lookups.

Network Guide

PowerShell Networking Cheatsheet for Windows

A PowerShell networking cheatsheet: test a port with Test-NetConnection, read your IP and DNS with Get-NetIPConfiguration, find listening ports, resolve names.

 Answer card comparing Proxmox VE, VMware ESXi and Hyper-V in 2026 across cost, clustering, backup and containers, with Proxmox the default pick for most.

Sysadmin

Proxmox vs ESXi vs Hyper-V in 2026: Which to Run

Proxmox vs ESXi vs Hyper-V in 2026: honest cost, licensing, clustering, backup and containers after the Broadcom shakeup, plus which fits homelab or enterprise.

 Answer card: a Python regex cheatsheet of 20 tested re patterns for email, IPv4, URL, UUID, log lines and more, each with its edge case.

Dev Guide

Python regex cheatsheet: 20 essential patterns explained

A Python regex cheatsheet of 20 tested re patterns: email, IPv4 and IPv6, URL, phone, ISO 8601, UUID, CSV split, log lines, slugs, with the edge case for each.

 Answer card for the rsync cheatsheet: mirror a folder with rsync -av, copy over ssh with rsync -avz, mirror exactly with --delete, preview with a dry run, resume with -avP, and the trailing slash gotcha.

Sysadmin Guide

The rsync Cheatsheet: Mirror, Sync and Copy Over SSH

A practical Linux rsync cheatsheet: mirror with rsync -av, copy over ssh with -avz, mirror exactly with --delete, dry-run, resume, and the trailing slash gotcha.

 Answer card for hardening an Ubuntu 24.04 server: keys-only SSH on a custom port, UFW default deny, fail2ban, unattended-upgrades, AppArmor enforce, auditd.

Security Guide

Ubuntu 24.04 Server Hardening: SysAdmin Checklist

Ubuntu 24.04 server hardening, the way I run it on every VPS: keys-only SSH on a quiet port, UFW, fail2ban, unattended updates, AppArmor enforcing, auditd.

 Answer card for a self-hosted WireGuard VPN: server on a 5 EUR VPS, split vs full tunnel, Curve25519 keys, NAT and DNS done right.

Network Guide

Self-Hosted VPN with WireGuard: Setup Guide

Self-hosted WireGuard VPN on a 5 EUR VPS: pick split vs full tunnel, generate Curve25519 keys, write the server and client configs, and get NAT and DNS right.

 Answer card for a SOC homelab: Wazuh host monitoring and SIEM, Suricata network IDS, and the Elastic Stack for storage and search, on one small VM.

Security Guide

SOC Homelab with Wazuh, Suricata and ELK

Build a SOC homelab with Wazuh, Suricata and the Elastic Stack on a spare VM: the single-node installer, agent enrolment, and test attacks you can fire yourself.

 Answer card for running Nagios Core on a Hyper-V Ubuntu 24.04 VM: build from source, probe HTTP, SSH, MySQL and disk, alert by mail and Telegram.

Sysadmin Guide

Nagios on Hyper-V: Server Monitoring Setup Guide

Server monitoring with Nagios on a Hyper-V Ubuntu 24.04 VM: build Nagios 4.5 from source, aim HTTP, SSH, MySQL and disk probes, then wire mail and Telegram alerts.

 Answer card for the SSH command cheatsheet: connect with ssh user@host, make an ed25519 key, push it with ssh-copy-id, copy files with scp, and tunnel with -L and -D.

Sysadmin Guide

SSH Command Cheatsheet: Connect, Keys, scp, Tunnels

A practical SSH command cheatsheet, most-used first: connect with ssh user@host, make an ed25519 key, push it with ssh-copy-id, copy files with scp, tunnel ports.

 Answer card for SSH Permission denied (publickey): read the handshake, then close the first failing gate, from agent to authorized_keys to permissions to sshd to SELinux.

Sysadmin Guide

SSH Permission Denied (publickey): The Fix

Permission denied (publickey) is never mysterious once you read the handshake. The real causes in order, each with the exact command to confirm and fix it.

 Answer card for the systemctl and journalctl cheatsheet: status to check a service, restart and reload, enable --now to start now and on boot, daemon-reload after a unit edit, and journalctl -u NAME -f to tail logs live.

Sysadmin Guide

systemctl and journalctl Cheatsheet

A systemctl and journalctl cheatsheet: status to see if a service runs and why it died, restart, reload, enable --now, daemon-reload, and journalctl -u NAME -f.

 Answer card: Tailscale is WireGuard plus a control plane that distributes keys, traverses NAT via DERP, runs MagicDNS and enforces ACLs.

Network

Tailscale vs WireGuard in 2026: Not Competitors

Tailscale vs WireGuard in 2026: Tailscale is WireGuard plus a control plane for keys, NAT traversal via DERP, MagicDNS and ACLs. When each one wins.

 Answer card for the Linux tar command cheatsheet: create a gzip archive with tar -czf, extract with tar -xzf using the eXtract Ze File mnemonic, list with tar -tzf, and pick a compressor.

Sysadmin Guide

The tar Command Cheatsheet: Create, Extract, List

A practical Linux tar cheatsheet: create a gzip archive with tar -czf, extract with tar -xzf (eXtract Ze File), list with tar -tzf, plus exclude and strip-components.

 Answer card for Core Web Vitals 2026: LCP under 2.5 s, INP under 200 ms, CLS under 0.1, all judged at the 75th percentile of real field data.

SEO Guide

Core Web Vitals 2026: Fix LCP, INP and CLS (Real Code)

Core Web Vitals in 2026: before/after code I shipped for LCP, INP and CLS, reading a Lighthouse capture honestly, plus the WordPress and Cloudflare toggles I reach for.

 Answer card for self-hosting Vaultwarden: one Docker container behind Caddy with automatic TLS, first admin signup, signups disabled, then fail2ban, restic backups and a locked admin route.

Security Guide

Vaultwarden Self-Host Guide: Bitwarden in 20 Minutes

Vaultwarden self-host guide: docker compose plus Caddy with automatic TLS, your first admin signup, then fail2ban, restic backups, and locking down the admin route.

 Answer card for a VMware ESXi PSOD: read the build, exception type, top backtrace frame and coredump status, then recover the host.

Sysadmin Guide

VMware ESXi PSOD: Diagnose and Recover the Host

VMware ESXi PSOD fix guide: read the purple screen, tell a bad driver from dying hardware, grab the coredump before you reboot, then recover the host.

 Answer card: two ways to run VMware Workstation and Hyper-V together, keep Hyper-V and upgrade VMware to 16+ on the Windows Hypervisor Platform, or disable Hyper-V and VBS for legacy VMware 15.

Sysadmin Guide

VMware Workstation and Hyper-V on the Same PC (2026)

The VMware Device/Credential Guard not compatible error has two fixes: keep Hyper-V and upgrade VMware to Workstation 16+, or disable Hyper-V and VBS for VMware 15.

 Answer card for Wazuh SIEM on a budget: a Raspberry Pi 5 under 100 EUR, an Intel N100 mini-PC, or a Hetzner CAX21 ARM cloud node under 10 EUR a month, all running the single-node bundle.

Security Guide

Wazuh SIEM on a Budget: Pi, N100 or Cloud

Wazuh SIEM on a budget, three paths I actually run: a Raspberry Pi 5 under 100 EUR, an Intel N100 mini-PC, or a Hetzner CAX21 ARM node under 10 EUR a month.

 Answer card: target WCAG 2.2 level AA, kill the five issues that sink most sites, and test with an automated pass, a keyboard pass and a screen-reader pass.

SEO Guide

Web Accessibility and WCAG in 2026

Web accessibility in 2026: target WCAG 2.2 AA, fix the five issues that sink most sites (contrast, alt text, labels, link text, page language), and test it yourself.

 Answer card for Web Workers in 2026: offload heavy JavaScript to another thread so the main thread stays free and INP drops under 200 ms.

Dev Guide

Web Workers in 2026: Patterns, Pitfalls and INP

Web Workers in 2026: the patterns I reach for, the ones I skip, transferables, SharedArrayBuffer, Comlink, and how to prove the move actually helped your INP.

 Answer card for a 2026 web app security audit worked in four layers: transport, application code, supply chain and secrets, each mapped to OWASP 2025.

Security Guide

Web App Security Audit 2026: A Practical Method

The web app security audit I actually run in 2026, in four layers: transport, app code, supply chain, secrets, with the tools and a 25-point checklist.

 Answer card for a 10-step WordPress security audit in 2026: PHP and WP versions, plugin CVEs, HTTP headers, htaccess, TLS, login 2FA, xmlrpc, user enumeration, logging, off-site backups.

Security Guide

WordPress Security Audit in 10 Steps (2026)

A WordPress security audit you run in about 90 minutes: PHP and WP versions, plugin CVEs, HTTP headers, htaccess, TLS, 2FA, xmlrpc, user enumeration, logs and backups.