To install a package using <span class="application">Synaptic</span>:
*Synaptic*:

To install a package using *Synaptic*:

Using a*Additional sSoftware*:

Using *Additional Software*:

Correct the ownership and permissions of your additional `sources.list` files to be owned by `root` and only readable by others. For example:, execute the following commands.

Correct the ownership and permissions of your additional `sources.list` files to be owned by `root` and only readable by others. For example, execute the following commands.