Finch is a terminal based chat client that you can use to chat using your.. terminal window.
To install finch open a terminal window (press Ctrl+Alt+T) and copy+paste the following line:
sudo apt-get install finch
When installed you need to add a line to the bash.rc file. Click on your Home Folder launcher in your Unity panel and press Ctrl+H to show the hidden folders and files. Search for the .bash.rc file, open it and add the following line:
export...
