topic remote command execution in Operating System - HP-UX

remote command execution

John Carver — Mon, 02 Dec 2002 20:57:24 GMT

I need to execute a custom command on a remote machine. remsh seems to be the most likely command but I think I am running into the terminal issue mentioned in the man page. If I telnet to the remote host, everything works fine and I get a formatted output. Is there another command to use? Also a question about the execution environment. When you use remsh for a specific user, does the command run in the environment of that user?

Re: remote command execution

Theresa Patrie — Mon, 02 Dec 2002 21:14:18 GMT

It would help to know what you are trying to do remotely. The environment used by remsh is not the same as the environment on the original machine. A simple way to show this would be to add a path to an executable to your $PATH on the local machine, then try to run the same command using remsh.
I think remsh is usually the way to go. You must specify absolute paths to non-system commands (I usually specify the complete paths to system commands as well). If it is output you are not seeing on the screen, maybe you need to re-direct the output to a file.
Theresa

Re: remote command execution

Bill Hassell — Mon, 02 Dec 2002 21:47:24 GMT

remsh does not login like telnet. Therefore, nothing in /etc/profile or .profile is run so the environment is nothing like a telnet connection.

remsh is typically used as a batch command to gather information or to kick off some process remotely (ie, remsh remote-cpu bdf), but as the man page suggests, it doesn't work for interactive commands like vi. And if the application expects to see a terminal with fancy features, you'll have to export that on the command line something like this:

remsh remote-cpu export TERM=hpterm /path/to/appicaltion optional-parameters...

Re: remote command execution

John Carver — Mon, 02 Dec 2002 23:47:51 GMT

The ability of this process to run had everything to do with setting up the proper environment. I took the relevant lines from /etc/profile and the users .profile and created a new file to be read before execution.
I redirected the standard out to /dev/null since the program that will launching this does not need this information. Now the results
are the same as if the user on the remote machine had run this directly.

remsh nimbus -l poller '. /optim/bin/.remsh_env;/optim/bin/OptimExtract --modules=product > /dev/null'

Thanks to all for pointing me in the right direction.