Linux Guides
Everyday Ubuntu server administration — permissions, ports, and diagnostics.
All guides
Find the Process Using a Specific Port in Ubuntu
The exact commands to find out what's listening on a port and kill it — ss, lsof, and fuser compared.
chmod and chown: File and Directory Permissions Explained
How Linux permission numbers actually work, the difference between chmod and chown, and why recursive chmod on a whole project is usually the wrong move.
Check Server Memory, Disk, and CPU Configuration in Ubuntu
The exact commands to check RAM, disk space, and CPU specs on an Ubuntu server — and which one to reach for when something's actually running slow.