puzzling no output from nrpe run of check_load

[David Harbaugh]

'su -' makes the shell a login shell ... which requires a real shell, not /bin/false.

What if you do this?

sudo su nagios more /proc/loadavg

Skip the -, which should run more directly, which should work even with /bin/false listed as the shell.

If that works, then you should be able to modify your nagios command definition the same way ...


-----Original Message-----
From: Peter N. Steinmetz [mailto:PeterNSteinmetz at steinmetz.org] 
Sent: Wednesday, April 25, 2012 12:42 PM
To: Nagios Users List
Subject: Re: [Nagios-users] puzzling no output from nrpe run of check_load

Yes, ls -l /proc/loadavg shows:

-r--r--r--  1 root       root

which I believe mean any user can read it. 

Yet, 
sudo su - nagios more /proc/loadavg
returns nothing when the nagios user has /bin/false for a shell, and returns the expected output when the nagios user has /bin/bash for a shell.

I added the following line to /etc/sudoers:
nagios ALL=(ALL) NOPASSWD: /proc/loadavg
but that doesn't fix the problem.

thanks,
Peter

On Apr 25, 2012, at 9:09 AM, Alex Griffin wrote:

> Does the nagios user have read access to /proc/loadavg?
> 
> Alex Griffin
> ---
> Tech Team
> agriffin at nagios.com
> 


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Exclusive live event will cover all the ways today's security and 
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