APT packages tool

# apt-cache search [package]

returns list of packages which corresponds string "searched-packages" [man]

# apt-cdrom install [package]

install / upgrade a deb package from cdrom [man]

# apt-get install [package]

install / upgrade a deb package [man]

# apt-get update

update the package list [man]

# apt-get upgrade

upgrade all of the installed packages [man]

# apt-get remove [package]

remove a deb package from system [man]

# apt-get check

verify correct resolution of dependencies [man]

# apt-get clean

clean up cache from packages downloaded [man]