pwd

PWD  -  print working directory

Usage:  PWD

The PWD command is like the shell command "pwd".  It shows the
  current working directory, that is, the directory MM is in now.
  Since MM assumes the current directory for some commands, you may
  want use PWD to see what it is.  For example, the LIST command, 
  writing to a file, and control-b, inserting a file into a message 
  being written, assume the current directory.

The CD command changes the working directory for the MM process.

(The commands COPY, EXAMINE, GET, MOVE, WRITE all default to the
  MAIL-DIRECTORY, regardless of the current directory.)

For more help type HELP and one of these topics:
  cd   list   other   set mail-directory   directory