SSH and SCP HELP Post: 302338749

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Top Forums Shell Programming and Scripting SSH and SCP HELP Post 302338749 by mglenney on Tuesday 28th of July 2009 08:13:56 PM

07-28-2009

Registered User

Unless something has changed that I don't know about, you cannot su to another user when executing a command via ssh. Something about the su command needing you to be assigned a tty.

What you CAN do is sudo commands. So if you need to run something as root and you have sudo rights your script can do this:

Code:

ssh me@host "sudo somecommand"

That will ssh to "host" and execute "somecommand" as root.

Also, your script examples are a little flawed. You have ssh on it's own line and then some commands after that. That's now how that works. In your examples, you would ssh to the box in question and once you exited that box the remainder of the commands would be run. You can put your commands into a script on the remote server and then execute that script:

Code:

ssh me@host "/path/to/script"

NOTE: I keep putting the command in quotes but that's not required unless it contains spaces.

Even if you do this you're still going to have issues with switching users (I believe. you'll have to try it). If you need all the commands in the remote switch to run as root you can just "sudo /path/to/script".

mglenney

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LEARN ABOUT V7

ssh-argv0

SSH-ARGV0(1)						    BSD General Commands Manual 					      SSH-ARGV0(1)

NAME

     ssh-argv0 -- replaces the old ssh command-name as hostname handling

SYNOPSIS

     hostname | user@hostname [-l login_name] [command]

     hostname | user@hostname [-afgknqstvxACNTX1246] [-b bind_address] [-c cipher_spec] [-e escape_char] [-i identity_file] [-l login_name]
     [-m mac_spec] [-o option] [-p port] [-F configfile] [-L port:host:hostport] [-R port:host:hostport] [-D port] [command]

DESCRIPTION

     ssh-argv0 replaces the old ssh command-name as hostname handling.	If you link to this script with a hostname then executing the link is
     equivalent to having executed ssh with that hostname as an argument.  All other arguments are passed to ssh and will be processed normally.

OPTIONS

     See ssh(1).

FILES

     See ssh(1).

AUTHORS

     OpenSSH is a derivative of the original and free ssh 1.2.12 release by Tatu Ylonen.  Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos,
     Theo de Raadt and Dug Song removed many bugs, re-added newer features and created OpenSSH.  Markus Friedl contributed the support for SSH
     protocol versions 1.5 and 2.0.  Jonathan Amery wrote this ssh-argv0 script and the associated documentation.

SEE ALSO

     ssh(1)

Debian Project							 September 7, 2001						    Debian Project

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