Git Undo Cheat Sheet: Fix Almost Any Mistake
How to undo commits, discard changes, fix the wrong branch, recover lost work with reflog and remove pushed mistakes safely.
Tag: cheatsheet
Linux File Permissions Explained: chmod, chown and umask
Understand rwx, octal modes, chmod, chown, setgid, sticky bit and umask, and debug "Permission denied" with namei.
Docker Cheat Sheet: Essential Commands and Troubleshooting
The Docker commands you use every day: run, logs, exec, build, volumes, cleanup, plus how to fix containers that exit or are unreachable.
Bash Scripting Cheat Sheet: Variables, Loops, Functions and More
A practical Bash reference: variables, arguments, conditions, loops, functions, arrays, string handling, redirects and exit codes with examples.
Useful Bash One-Liners for Sysadmins and Developers
Handy shell one-liners for finding files, analyzing logs, processing text, renaming in bulk, monitoring the system and moving data.