1001  echo $PS1
 1002  SAVE_PS1=$PS1
 1003  PS1="moo> "
 1004  PS1="howdy pardner$ "
 1005  PS1="\awhat$ "
 1006  PS1="\d "
 1007  PS1="\l"
 1008  ls
 1009  PS1="\d\n\$ "
 1010  ls
 1011  PS1="\t "
 1012  PS1="\T "
 1013  PS1="\v "
 1014  PS1="\V "
 1015  PS1="\! "
 1016  ls
 1017  echo $SAVE_PS1
 1018  PS1="\u >"
 1019  PS1="* "