How to search for packages using APT the Debian package manager used by Ubuntu & Linux Mint.

The first part of the apt-get search command is updating the mirror:

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apt-get update

Next we can perform a apt-cache search, apt-cache is the local cached copy of the mirror package list a small cached database of all the packages that exist on the mirrors specified in your sources.list file.

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apt-cache search nmap

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The above command will return the following output (screenshot from a Debian server):

After you complete your apt-get search (using the apt-cache command above) you can install the package using apt-get install.