apt-cache

Debian and Ubuntu package query tool.

• Search for a package in your current sources:

apt-cache search {{query}}

• Show information about a package:

apt-cache show {{package}}

• Show whether a package is installed and up to date:

apt-cache policy {{package}}

• Show dependencies for a package:

apt-cache depends {{package}}

• Show packages that depend on a particular package:

apt-cache rdepends {{package}}