====== Ubuntu - apt-get - Clean the system ======

Free up some disk space.

----

===== Remove all packages from the package cache =====

<code bash>
sudo apt-get clean
</code>

<WRAP info>
**NOTE:**  This may not be desirable if you have a slow Internet connection, since it will cause you to re-download any packages you need to install a program.

  * The package cache is in **/var/cache/apt/archives**.

  * See how much space cached packages are consuming: <code bash>
du -sh /var/cache/apt/archives
</code>

</WRAP>

----

===== Only remove packages that have a newer version available =====

<code bash>
sudo apt-get autoclean
</code>

<WRAP info>
**NOTE:**  **autoclean** only removes those retrieved package files that have a newer version now, and so will not be used anymore.

  * This command removes **.deb** files for packages that are no longer installed on your system.
  * Depending on your installation habits, removing these files from /var/cache/apt/archives may regain a significant amount of diskspace.

</WRAP>

----

===== Removes libraries and packages that were installed automatically to satisfy the dependencies of another installed package =====

<code bash>
sudo apt-get autoremove
</code>

<WRAP info>
**NOTE:**  **autoremove** removes libraries and packages that were installed automatically to satisfy the dependencies of another installed package.

  * If that package is removed, these automatically installed packages are useless in the system, and this command removes such packages.

</WRAP>