See APT manpage on Ubuntu docs.

Note that apt is a more modern version of apt-get. They are separate packages and commands are mostly the safe. See also aptitude command for a GUI.

You should use the sudo prefix for all the commands here, unless you are root. Some installs will fail without root privileges.

See also my os-genesis repo’s script which deal with APT.

Manage package

Specify one or more packages by name (separated by spaces).

Install package

$ apt install PACKAGE

e.g.

$ apt foo bar

Upgrade package

$ apt upgrade PACKAGE

Remove package

$ apt remove PACKAGE

Update all packages

$ apt update