Kubernetes Operator
Dive deep into the world of Operators and learn how to effortlessly manage and scale your…
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Quick Introduction to Linux Command Line
Linux and its famed command line is vast. But you have to start somewhere. If you…
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SSH Fundamentals
SSH has become a must know tool for sysadmins and developers alike. Often, your production or…
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RHCE Ansible EX294 Exam Preparation Course
Ansible has become a cornerstone in the realm of automation, enabling efficient management of IT infrastructure…
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Learn Docker: Complete Beginner's Course
Did you know that Docker dominates the containerization market with a huge share of over 80%?…
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Linux Command Nuggets
This book does not teach you to use the Linux commands in the traditional sense. It…
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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….
