popd
Restore the previous value of the current directory. 
SYNTAX
      popd [-p] [-l] [-n|-v] [+n]
OPTIONS
  The -l, -n and -v flags have the same effect on popd  as
	       on dirs.	 (+)
   +n   Remove the Nth directory (counting from the left of the list 
        printed by dirs), starting with zero. 
        The pushdsilent shell variable can be set to prevent this 
        and the -p flag can be given to override pushdsilent
   -n   Suppress the normal change of directory when removing directories from 
        the stack, so that only the stack is manipulated. 
Notes
  Without arguments, pops the directory stack and returns to the new top directory.
all forms of popd print the final directory stack
su uses the environment variables: HOME, PATH, TERM and USER.
popd is a tcsh shell command.
"Half a pound of tuppenny rice, Half a pound of treacle, that's the way the money goes, Pop! goes the weasel"
Related commands:
  
  pushd - Save and then change the current directory 
  
  
  Equivalent BASH command:
  
  popd - Restore the previous value of the current directory