rse repositories in /etc/apt/sources.list file
<code>sudo gedit /etc/apt/sources.list</code>
Make sure you have the following two lines save ... he following command to update the source list
<code>sudo apt-get update</code>
Install mplayer using the following command
<code>sudo apt-get install mplayer</code>
if you want to open mplayer just type
<code>gmplayer</code>
or
You can Open from Applications—>Sound&Video—> Mpla
