Speed up your work at the shell.
Goal: issue commands as fast as you think by minimizing typing.

1. Command history.   
Easily recalled and modified.
Retrieve previous commands with UP arrow. 
Left, right arrow keys, HOME and END move in command line.
Backspace and DEL delete character.
^U (hold Ctrl hit u) kill line
^K kill to end of line
Esc D  delete word

history    lists all your commands.
!54        re-executes command 54
!la        re-executes last command that started with la


2. Filename completion service.
Shell will complete the name of a file. 
Only have to type a prefix of filename (enough to unambiguously specify the file),
then hit Tab key, shell will fill the rest of the name.  If ambiguous, hit Tab twice
to get list of possibilities.


3. Multiple Terminal windows or multiple tabs within a Terminal window, each
running a shell.


4. Mouse can drag copy (highlight) and paste (middle button) to command line or into application. 
Single, double, triple clicks for character, word, line highlight.


Colorized prompt: uncomment line 30 of .bashrc in your home directory, restart shell.
Makes it easier to see your commands.
#force_color_prompt=yes          remove the #