List contents of a directory ls
Searches a file or input for particular characters grep
Change directories cd
Turn off or power off shutdown
Get the current working directory of a shell pwd
Set a user's password passwd
Move a file mv
Copy a file or directory cp
Delete a file or directory rm
Sets permissions of files or directories chmod
Sets the owner of files or directories chown
Configure wireless networking settings iwconfig
Configure network settings ifconfig
Lists processes ps
Used to run subcommands as root (admin) sudo
Used to switch users in a shell su
Ubuntu package manager apt-get
Text editor that is infamous for being impossible to exit vi
Stop a running process kill