Learn how to display information about your system/logo with Screenfetch. This tutorial will work with Ubuntu and Debian based distros. You can apply similar steps to Arch based operating systems. This tutorial requires that you install a PPA!
Be sure to look for the .bashrc file. This is normally in the home folder, but can be found in different places depending on the distribution.
You may have to create the .bashrc FILE in distros like Linux Mint.