Create permanent bash alias in Ubuntu

1. Create .bash_aliases file in ~/ (home directory).
2. To see hidden file in ~/ :
   a. Nautillus file manager can use ctrl + h keyboard shorcut.
   b. Dolphin file manager can use alt + ..

Example .bash_aliases :

Instead sudo apt-get install user can just type agi in the terminal.

I can’t change the direction of the wind, but I can adjust my sails to always reach my destination. - Jimmy Dean