Linux Articles
What Is a Symbolic Link (Symlink) in Linux and How to Create One
A symlink is a pointer file referencing another file or directory by path. Learn how to create one with ln -s and how it differs from a hard link.
How to Set Up SSH Key Authentication on Linux
Generate an SSH key pair, copy the public key to a server, and log in without a password using ssh-keygen and ssh-copy-id.
How to Schedule Tasks With Cron on Linux
Cron runs scheduled commands at fixed times or intervals using crontab syntax. Learn the five-field schedule format and how to add a cron job.
How to Check Disk Space and Find What's Using It on Linux
Use df -h to check overall disk usage and du -sh to find which directories are taking up the most space on a Linux server.
How to Find and Kill a Process Using a Specific Port in Linux
Find which process is using a port with lsof -i or netstat, then kill it by PID — useful when 'Address already in use' blocks a server from starting.
How to Use chmod to Change File Permissions in Linux
chmod changes read, write, and execute permissions for a file's owner, group, and others. Learn the numeric (755) and symbolic (u+x) notation.