How to open .mp3 .mp4 .pdf .txt any file format using Terminal

 You need to install gnome-open


Open Terminal and type

sudo apt-get install gnome-open

then you need to go for the certain directory where your .mp3 .mp4 .pdf .txt any file is located and


type  gnome-open xxxxyyy.mp3
or  gnome-open xxxxyyy.mp4
or gnome-open xxxxyyy.txt
or gnome-open xxxxyyy.pdf

whatever it is !!