NAGIOS - check_by_ssh failed

[Andreas Ericsson]

Neal.Giger at chandleraz.gov wrote:
> Hey Guys,
> 
> I am having an issue with the check_by_ssh plugin and was wondering if 
> someone could lend a hand.  I have compiled and installed both NAGIOS 
> version  2.5 and the nagios-plugins 1.4.4 on EL4.
> 
> When trying to execute the check_by_ssh_plugin  and telling it to run just 
> a basic file listing command on a HPUX 11.11 host I receive the following 
> error:
> 
> ./check_by_ssh -v -H 10.1.9.21 -t 60 -n hpux2 -C '/usr/bin/ll /tmp'
> /usr/bin/ssh 10.1.9.21 '/usr/bin/ll /tmp'

Are you absolutely sure that "/usr/bin/ll" exists on hpux?
On fedora core 5, "ll" is an alias for "/bin/ls -l --color=tty -F".

Try running

/usr/bin/ssh 10.1.9.21 'ls /tmp'

I can guarantee you that "ls" exists and is in the path. Not even HP-UX 
diverges from that convention.

> Remote command execution failed:
> 
> However If I just cut and past the verbose output from the command calling 
> ssh directly I have no problems:
> 
> /usr/bin/ssh 10.1.9.21 '/usr/bin/ll /tmp'
> 

Sounds very odd indeed. What happens if you do

	echo $?

after running the command manually? If it says anything other than "0" 
(or possibly provides a long listing of /tmp), the command actually 
failed to run, although you didn't get an error message, or the HP-UX 
version of sshd didn't forward stderr to you.

-- 
Andreas Ericsson                   andreas.ericsson at op5.se
OP5 AB                             www.op5.se
Tel: +46 8-230225                  Fax: +46 8-230231

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