check_by_ssh error - Remote command execution failed

Grant Sewell nagios at thymox.co.uk
Wed Sep 2 12:45:19 CEST 2009


On Wed, 02 Sep 2009 06:25:48 -0400
Thomas Guyot-Sionnest wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> On 02/09/09 05:26 AM, Juki wrote:
> > Hello people,
> >
> > Remote command execution failed: ###################### !!!
> > WARNING !!! #############################
> 
> This had to do with the server's kay that changed and is being cached
> in the nagios user's ~/.ssh/known_hosts. Find any entry matching the
> target host name or IP and delete them, then connect manually to the
> host as the nagios user.
> 
> - --
> Thomas

I found that on a default Debian install (and presumably all
Debian-related Linux distros), the Nagios user's 'home' directory (ie
~) was stored on a tmpfs mount... so if the machine was ever rebooted
(we had several power-outs over the course of a week) the contents of
~/.ssh for the Nagios user wouldn't exist.  I changed the 'home' of the
Nagios user to somewhere on disk and stopped getting this error.

Grant.

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