p5 
Basic Commands
 $date
 $who
 $echo one

p6
Working with Files
 $ls
 $vi names
 $cat names 
 $wc names
   -l lines
   -c characters
   -w workds
 $cp names saved_names
 $mv saved_names hold_it
 $rm hold_it

p10
 working with directory
 TAB completion