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apt-cache is a part of the apt suite of tools used to manage packages in the Debian distribution. apt-cache is a tool for sifting through package information that resides on your computer after doing apt-get update


Search for a package using a keyword:

 apt-cache search mp3

This will search for packages that have "mp3" in the name or description.

Show package details:

 apt-cache show mpg123

This shows package information about a package named "mpg123". It will display things such as the package dependancies, the long description, the version, the installed size, etc.