apt-get

NAME
apt-get – APT package handling utility — command-line interface
SYNOPSYS
apt-get [-sqdyfmubV] [-o= config_string ] [-c= config_file ] [-t= { target_release_name | target_release_number_expression }] {update | upgrade | dselect-upgrade | dist-upgrade | install pkg [ { =pkg_version_number | /target_release_name } ] ... | remove pkg... | purge pkg... | source pkg [ =pkg_version_number ] ... | build-dep pkg... | check | clean | autoclean | autoremove | {-v | --version} | {-h | --help}}

EXAMPLE
apt-get install emacs