Try out rcp and rsh as follows:

? copy a single file from your local host to a remote host by using rcp
? obtain a shell on the remote host using rsh and edit the file that you just copied
? exit the remote shell using exit
? copy the file from the remote host back to the local host using rcp

If rcp is used properly, you will get no messages at all, just another shell prompt. Using rsh, you
will login on the remote machine and be able to type commands just as if you were logged on
locally. When you exit the remote shell, the shell prompt of your original shell will be displayed
again. When you copy the file back, it will again display no messages but the modified file will be
in your directory.