Problems checking external host

[ReynierPM]

Jim McNamara wrote:
Thanks for your fast reply Jim and it's a great entry I understood all 
and now know why my config doesn't work.

> Nagios runs as user nagios (usually), not as root, so that is the
> beginning of the problem. It is also possible that the remote host
> doesn't accept key based authentication, but the normal ssh daemon will
> accept keys ahead of passwords. 
> 
> On the nagios box, give yourself a shell as user nagios. depending on
> your permissions, you may need to specify /bin/bash or /bin/sh for your
> shell. Then you can generate the key with the ssh-keygen command. That
> needs to be done as user nagios. You also don't need to create 3 keys.
> That isn't the source of the problem, the limit on the number of keys is
> likely in the thousands, but the "default" key on most linuxes is
> ~/.ssh/id_rsa. So generate that without a password at a size that works
> for you. Use man ssh-keygen if anything I'm saying about this is
> unclear. 

I just have a little problem here. How can I became "nagios" if I login 
as "root"? I mean after login as "root" I get a "root" shell, how I can 
became "nagios" from this point?
-- 
Cheers
ReynierPM

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