LHB Linux Digest #25.21: firewalld, fail2ban, find command, self-hosted file management
AWS deleted my 10-year account and all data without warning After 10 years as an AWS…
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Filter journalctl Logs by Service
When your Linux system is generating thousands of log entries every minute, finding information about a…
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LHB Linux Digest #25.20: Journalctl Logs, Semgrep, lsattr, chattr and More Linux Stuff
Take advantage of the “lifetime membership” offer. For a single payment, you get the paid membership…
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Follow Journalctl Logs in Realtime to Monitor System and Services
The classic way of following a log file in real time is by using the tail…
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Convert Hex to ASCII Easily
Hexadecimal Input Convert Clear All Copy Result ASCII Output Supported Formats This tool accepts hexadecimal input…
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LHB Linux Digest #25.19: Newly Launched Systemd Course, Docker System Sub-Commands, Hard Links and More
We have just launched the “lifetime membership” option. For a single payment, you get the Plus…
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Regex Cheatsheet: Essentials You Must Know
Regex (Regular Expressions) is like a super-powered search function with pattern recognition. Think of it as…
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Module 6: Network management with systemd-networkd
Configure networks using systemd-networkd. Set static IPs, DHCP, bridges, and more—ideal for minimal or headless Linux…
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Ansible Yum Module: Manage Red Hat Packages
Modern infrastructure operations depend on automation not only for efficiency, but also for repeatability. Among the…
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LHB Linux Digest #25.18: Journalctl Logs, Restore Containers, Bash Test, Better Diff and More
The AWK series continues with two more chapters. I have changed my initial plan to completely…
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Chapter 5: Manipulating Strings in AWK
AWK isn’t just a text processor – it’s your personal calculator and string manipulation wizard rolled…
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Chapter 5: Manipulating Strings in AWK
AWK isn’t just a text processor – it’s your personal calculator and string manipulation wizard rolled…
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Chapter 4: Mathematical Operations in AWK
AWK handles numbers like a built-in calculator. I would say like a scientific calculator, as it…
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LHB Linux Digest #25.17: AWK Series, at command, Docker Copy, Pangolin and More
I told you about the AWK tutorial series in the previous newsletter. Well, it has an…
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Chapter 3: Built-in Variables and Field Manipulation
You already saw a few built-in variables in the first chapter. Let’s have a look at…
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Chapter 2: Pattern Matching and Basic Operations
Think of AWK patterns like a security guard at a nightclub – they decide which lines…
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Chapter 1: Introduction to AWK
If you’re a Linux system administrator, you’ve probably encountered situations where you need to extract specific…
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LHB Linux Digest #25.16: AWK, History, YAML Validation, Mastering Top and More
Is it too ‘AWKward’ to use AWK in the age of AI? I don’t think so….
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LHB Linux Digest #25.15: New Docker eBook, Declare in Bash, Debug Ansible Playbook and More
We have converted our text-based Docker course into an eBook; Learn Docker Quickly. It is available…
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Using Bash Declare: Gateway For Effective Variable Management
Ever wondered how to make your bash scripts more robust and professional? The declare command in…
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Linux Handbook
Paste your YAML content or upload a file to validate syntax. Scroll down to see the…
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Why Homelab When You have Cloud Services Like AWS, Vercel, Hetzner?
I see a lot of posts on my Twitter (or X) feed debating the merits of…
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LHB Linux Digest #25.10: Peersuite, YAML Essentials, Splitting Screen in Vim and More
Linux doesn’t get easier. You just get better at it. This is what I always suggest…
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Using Split Windows With Vim
Have you ever watched a bearded sysadmin navigate their editor with lightning speed, jumping between multiple…
