[CentOS] SSH Remote Execution - su?

Tim Nelson tnelson at rockbochs.com
Wed Mar 3 22:25:01 UTC 2010




Tim Nelson 
Systems/Network Support 
Rockbochs Inc. 
(218)727-4332 x105 

----- "Jeremy Rosengren" <jeremy.rosengren at gmail.com> wrote: 
> 

> On Wed, Mar 3, 2010 at 3:36 PM, James Hogarth < james.hogarth at gmail.com > wrote: 
> 




> On 3 March 2010 21:20, Tim Nelson < tnelson at rockbochs.com > wrote: 
> > Greetings All- 
> > 
> > I'm about to embark on some remote management testing and need a way to login to a remote system running CentOS 4.x/5.x via SSH, su to root (using a password), then execute a command. 
> > 
> > I currently login to the boxes using key based SSH like this: 
> > 
> > ssh -i ~/remote_key admin@$REMOTEIP 
> > 
> > Then, I SU to root. However, if I try to do this automatically like this: 
> > 
> > ssh -i ~/remote_key admin@$REMOTEIP 'su -l' 
> > 
> > I'm getting: 
> > 
> > "standard in must be a tty" 
> > 
> > So, how am I able to remote login using SSH, su to root, then execute a command as root? 
> > 
> > All comments and suggestions welcome. Thanks! 
> > 
> > --Tim 
> > _______________________________________________ 
> > CentOS mailing list 
> > CentOS at centos.org 
> > http://lists.centos.org/mailman/listinfo/centos 
> > 
> 
> Best off configuring sudo for that user (with no password) and make 
> sure that user has !requiretty in the sudoers configuration. 
> 
> James 
> 


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> 
Does "ssh -t" help? 

YESS. It prevents the tty error from showing up and asks me for a password as expected. BUT, how do I then automate the entering of the password? 

John Kennedy mentioned using expect which I've used before but found it to be 'finnicky'. I may have to look at it again... 

Changing settings such as sudo configuration or ssh config may be daunting since I have a large number of systems(150+) that would need to be modified. :-/ 

--Tim 
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