[kroc] - 10 Jul 2003 - '''R'''emote '''exec'''ution: allow to launch a command on a remote computer. It needs two parts: a REXEC client to send the command and a REXEC deamon (server) running on the target computer.

 Usage: rexec [ -abcdhns ] -l username -p password  host command
     -l username: Sets the login name for the remote host.
     -p password: Sets the password for the remote host.
     -n: Explicitly prompt for name and password.
     -a: Do not set up an auxiliary channel for standard error.
     -b: Use BSD-rsh type signal handling.
     -c: Do not close remote standard in when local input closes
     -d: Turn on debugging information.
     -h: Print this usage message.
     -s: Do not echo signals to the remote process.

REXEC must be use very carefully because it could give an unsecured access to a network.
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[sdx] provides a REXEC compatible server (see http://www.equi4.com/204 for details).

I've done a REXECD [starkit] using it, available here: http://www.larochelle-innovation.com/tcltk/pub/rexecd.kit

It's pure tcl so it shall runs on all tcl supported platforms.

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REXEC for linux: 

most linux distributions provides rexec client and rexecd.
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REXEC for windows (commercial):

http://www.denicomp.com (quite slow) - http://www.cursor-ri.com (faster but XP / 2K problems) - http://www.hummingbird.com (expensive and complex but powerfull).