Vim & Sed: Efficient Text Editing and Search-Replace
Vim Shortcuts, Mastering Vim navigation, text replacement patterns, and non-interactive editing with sed for the LFCS exam.
Imran Bhullar
Understanding Linux File Links, Inodes, and Metadata
A deep dive into hard links vs. symbolic links, directory structures, and file metadata analysis.
Mastering Linux Aliases and Command Types
A guide to creating shortcuts with aliases, identifying command types, and managing terminal sessions for the LFCS exam.
The Linux Survival Guide: How to Get Help from the Command Line
Don't get stuck in the terminal. Learn the essential commands to find documentation, manuals, and command usage directly from the Linux CLI.
Linux Privilege Management: Mastering su, visudo, and Polkit
A deep dive into substituting users, safe sudoers configuration, and recovering from misconfigurations.
Mastering Linux File Discovery: The Power of Find and Locate
In the world of Linux administration, being able to find the right file quickly is a superpower. While there are many ways to search, two tools stand above the rest: find and locate. Here is a bre...
Mastering Linux Permissions: From chmod to umask
Understanding how Linux handles file access is a cornerstone of system administration. Whether you are troubleshooting a “Permission Denied” error or securing a web server, you need to know how to ...
The Chronicles of UNIX: From Giants to Open Source Freedom
A journey through the history of UNIX, the birth of Linux, and the evolution of the major distributions like RedHat and Solaris.
Moving from ifconfig to ip: A Cheat Sheet for Sysadmins
The classic ifconfig command is being phased out. Learn how to perform common networking tasks using the modern 'ip' utility.
Automating the Boring Stuff with Pexpect: A Sysadmin's Guide
Learn how to use the Pexpect Python module to automate CLI interactions with FTP servers, MySQL databases, and network appliances.