Commands in Linux

chmod command

Changes the mode of a file.

su command

Switches the current user to another.

sudo command

Allows for execution of commands as a different user such as a superuser.

chown command

Changes the owner of a file.

passwd command

Changes user passwords but normal users can only change their own.

ps command

This takes a snapshot of the current running programs and displays the PID’s.

kill command

This kills a process identified by its PID.

printenv command

This displays the current environmental factors.