apt.md

apt-get(1)

apt-get update
apt-get install -y \<package>

apt-get autoclean
apt-get download \<package>              # download and then use dpkg(1)

apt-cache(1)

apt-cache pkgnames \<package>            # list all the packages starting with \<package>
apt-cache search \<package>              # list specific packages with short description
apt-cache show \<package>                # show package information

aptitude(8)

aptitude is a terminal-based frontend for apt.

aptitude                                # start aptitude GUI

dpkg(1)

dpkg just installs a .deb file, but not its dependencies.

dpkg -I \<package.deb>                   # show package information
dpkg -c \<package.deb>                   # show contends of package.deb
dpkg -i \<package.deb>                   # install a package (no dependencies installed!)
dpkg -r \<package>                       # remove a package

dpkg -L \<package>                       # list files a package installed on your system