Linux & Bash Tutorial

Linux and the shell Linux is an open-source operating system that runs most of the world's servers, cloud infrastructure and Android phones. You often work with it through a text ...

Where am I, and what is here Looking at files tail -f is invaluable for watching a server log in real time. Creating and removing Care: there is no recycle bin. rm -r is ...

Reading permissions ls -l shows a permission string like -rwxr-xr-- . After the first character (file type), it is three groups of three: owner (rwx) – the user who owns the file. ...

The Unix philosophy Each Linux tool does one thing well. Real power comes from composing them – feeding the output of one command into the next. This is the Unix philosophy, and ...

Processes Every running program is a process with a numeric ID (PID). Inspect and control them: Background jobs and services Long-running programs are usually managed as systemd ...

Your first script A Bash script is a text file of commands. The first line, the shebang , tells the system which interpreter to use: Variables and arguments Use $name to read a ...