Learn to use Linux commands, SysAdmin tools, Self-hosting, Docker and other DevOps stuff with us.
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AI has solved one of the most complex maths problem in the world.
Meanwhile, websites still using this captcha to deter AI.
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💡 Quick Linux Command Line Tip
Hide the dot directories but show other hidden directories by using
$ ls -A
instaed of
$ ls -a
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Come to think of...root directory is more like the trunk of a tree than root of a tree
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My Linux systems are suffering extra this summer season
But then this summer is brutal, and not just for gadgets 🥵
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About time someone wrote a book on using AI for DevOps and Linux sysadmins.
Available here: amazon.com/Ultimate-Guide-Li…
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One of the biggest cybersecurity embarrassments of 2026 just happened.
Sensitive credentials linked to the US Cybersecurity agency (CISA) were reportedly found sitting inside a PUBLIC GitHub repository.
The exposed data allegedly included:
• SSH keys
• Plaintext passwords
• Internal system credentials
• Access linked to CISA and DHS environments
And the worst part?
Some of it may have been publicly accessible since November 2025.
According to reports, the leak came from a contractor-managed GitHub repo that was improperly secured. In simple words: someone accidentally left the digital keys to critical systems lying around on the internet.
What does this mean for users?
There’s currently no evidence that citizen data was stolen.
But incidents like this increase risks of phishing, impersonation attacks, and future breaches.
It also shows how even top cybersecurity organizations can fail basic security hygiene.
The agency responsible for protecting US infrastructure got caught exposing its own credentials online.
Cybersecurity isn’t just about advanced AI threats anymore. Sometimes it’s still just… human stupidity.
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You let Claude rewrite your entire codebase
And now something's broken
And you have no idea what it changed, why it changed it, or how to go back
There's no git log. no blame. no undo.
Just vibes and a prayer 🙏
This open source AI too, fixes this.
It's like git for AI agents.
Every tool call tracked, every line traced back to the prompt that wrote it, full rewind coming soon
Give your agent write access AND an audit trail with re_gent
👉 github.com/regent-vcs/re_gen…
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Linux tip of the day 💡
Ever wished you could copy your recent terminal commands without line numbers?
fc -ln
Clean. Copy-paste friendly. Human readable.
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Devops, cloud, Linux... forget any other certification
This is the only certification in 2026 that will give you a high paying role in this AI era.
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Time is optional. Without it, Vim treats the number as undo steps:
To undo last 3 changes
:earlier 3
And later redo 1 change
:later 1
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Linux tip of the day 💡
Vim can undo by time, not just by steps.
Instead of hitting u repeatedly, use:
: earlier 2m
This rewinds the buffer to how it looked 2 minutes ago. Extremely useful after bulk edits.
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Linux Tool Highlight of the Week ✨
WhatsDiff: The AI-Ready Dependency Inspector
A CLI tool that help you inspect what has changed in your dependencies after an update. It scans your lockfiles and surfaces the "why" behind every dependency change.
Features
🔍 Analyze 𝚌𝚘𝚖𝚙𝚘𝚜𝚎𝚛.𝚕𝚘𝚌𝚔 / 𝚙𝚊𝚌𝚔𝚊𝚐𝚎-𝚕𝚘𝚌𝚔.𝚓𝚜𝚘𝚗 changes
📖 Read changelogs directly in the terminal
⌨️ Interactive TUI (Vim keys!)
🤖 MCP server for AI-assisted upgrades
🚀 Scriptable CI/CD integration
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Me and the boys after endorsing all kinds of skills on each other's LinkedIn profile.
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If you love Ghostty terminal, you'll love this nifty web tool.
It allows you to configure the most common options visually, and then get a configuration file that you can apply over your own.
You can also upload an existing configuration and work on top of it 😎
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If it is off, turn it on for the current session using:
$ set -o noclobber
Or, turn it on permanently by adding the above line to your bashrc file.
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Linux Tool Highlight of the Week ✨
Tach: Python Dependency Visualizer & Enforcer
It is a command-line tool for defining and enforcing dependency boundaries in Python codebases.
It helps projects describe allowed module relationships and detect violations as the code evolves, supporting structured and maintainable architectures.
⚡ Implemented with no runtime impact
♾️ Interoperable with your existing systems
🔥 Interactively define module boundaries
📐 Visualize your project's dependency graph
🔧 Able to be adopted incrementally
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Why Zsh is so awesome 😍
While standard shells like bash require you to pipe variables into sed or basename to manipulate strings, Zsh builds this logic directly into the variable expansion syntax.
It breaks script portability, because of POSIX incompatibility. But for interactive use and personal configs, it is exponentially faster.
The most useful one? The :r (root) modifier, which strips the file extension.
The syntax is: ${file:r}
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Linux Tool Highlight of the Week ✨
🧠 Gonzo: Real-Time AI-Enhanced TUI Log Explorer for Developers & SREs
It is an open-source TUI tool written in Go for real-time log analysis and visualization directly from the command line. It’s inspired by k9s and supports logs stream analysis with beautiful charts, AI-powered insights, and advanced filtering, all from your terminal.
🔥 Real-Time Log Streaming: Process logs live from files, stdin, or network.
📊 Interactive Dashboard: k9s-style TUI with charts, heatmaps, smart navigation, and more.
🔍 Advanced Filtering: Regex, attribute, severity & Kubernetes-aware interactive filters.
🎨 Customizable Themes: Built-in skins, plus custom YAML-configurable themes.
🤖 AI-Powered Insights: Pattern detection, anomaly analysis & root-cause help with configurable LLMs.
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Linux tip of the day 💡
While editing a file in nano, press Ctrl + T to run a shell command without leaving the editor.
Nano executes the command and inserts its output into the current file, which is useful for quickly adding command results or generated text while you edit.
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Linux tip of the day 💡
Instead of tail, view log files in realtime with the +F flag:
$ less +F hello.txt
Advantage? Your screen is not flooded when you exist the log view.
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Linux tip of the day 💡
You can ask `du` to skip certain folders by listing their names in a text file, so they don’t appear in disk usage results. This keeps the output clean and avoids counting things you are not interested in.
du -h -X excludes.txt
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Linux tip of the day 💡
In the terminal, Alt + . is a small but powerful productivity shortcut. It inserts last argument of your previous command at the cursor position.
Ideal for reusing long file paths or filenames without retyping.
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Struggling with Ubuntu Linux? You need this book.
Written by Ubuntu core developer Ken VanDine, this is your complete guide to mastering Ubuntu.
👉 amazon.com/Ultimate-Ubuntu-H…
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This is also a classic.
Please know that these are low level stuff, lots of C programming. So please ensure that you already have solid understanding and experience with Linux.
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The two Linux books you should read to take your core Linux knowledge to the next level 🐧📚
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When the rm command that was supposed to only delete files in current directory is still running after 27 seconds
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Struggling with slow Docker builds? Utilize the power of build cache 💪
The build cache reuses image layers and metadata to make builds faster. When you rebuild an image with no or minimal changes, the builder reuses work from the previous build.
Here’s an illustrated example (from @depotdev) of how build cache works across builds 👇
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Linux tip of the day 💡
You can use the fc command to edit commands from history. Let's say you have to run edit commands from 230 to 232 in history.
fc 230 232
This opens the selected commands in your default terminal editor. Make changes to the command. Save the file and exit to run that command.
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Linux tip of the day 💡
Edit files within less session (for that power user feel)
While viewing files in less pager, you can press "v" key . This will open current file in the default editor as defined in the EDITOR variable.
Once you save the file and exit the editor, you can see the modified file in less pager.
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