====== Ubuntu - Packages - Install a package ======

Aptitude is preferred, but other approaches can be used if desired.

===== Using aptitude =====

First, update the package index.  The package index is essentially a database of available packages from the repositories defined in the **/etc/apt/sources.list** file and in the **/etc/apt/sources.list.d** directory.

<code bash>
sudo aptitude update
</code>

Now install the package.

<code bash>
sudo aptitude install package_name
</code>


<WRAP info>
**NOTE**:APT keeps a copy of each downloaded **.deb** file in the directory **/var/cache/apt/archives/**.

In case of frequent updates, this directory can quickly take a lot of disk space with several versions of each package.
</WRAP>