rsh
[options] host [command]A BSD-derived command to invoke a remote shell. This command is often found in /usr/ucb and should not be confused with rsh, the restricted shell. On Solaris, it is in /usr/bin. rsh connects to host and executes command. If command is not specified, rsh allows you to rlogin to host. If shell metacharacters need to be interpreted on the remote machine, enclose them in quotes. This command is sometimes called remsh. See also ssh.
-l
userConnect to host with a login name of user.
-n
Divert input to /dev/null. Sometimes useful when piping rsh to a command that reads standard input but that might terminate before rsh.