check_by_ssh and currently logged users

[Marian Zurek]

Hi,

I wanted to see in the Nagios monitoring window the currently running processes.
For that purpose I worked out the command as follows:

/bin/ps aux | egrep -vw 'USER|root|postfix|daemon|rpc|xfs' | cut -f1 -d\  | sort 
| uniq -c | tr -s '\t \n' '  ,'

and put it as an argument to the check_by_ssh plugin, so the whole command_line 
as specified in the checkcommands.cfg file looks like following:

$USER1$/check_by_ssh -H $HOSTADDRESS$ --command='/bin/ps aux' | egrep -vw 
'USER|root|postfix|daemon|rpc|xfs' | cut -f1 -d\  | sort | uniq -c | tr -s '\t 
\n' '  ,'


but it doesn't seem to work properly. The whole output from the 'ps aux' command 
seem to be cut to the one line only. Is that expected behaviour ?

The attempt of processing the 'ps aux' output on the remote machine with the 
command:

./check_by_ssh -H remote_hostA --command='/bin/ps aux | egrep -vw 
'USER|root|postfix|daemon|rpc|xfs' | cut -f1 -d\  | sort | uniq -c | tr -s '\t 
\n' '  ,''

ends up with the errors like


bash: root: command not found
bash: xfs | cut -f1 -d\  | sort | uniq -c | tr -s t: command not found
bash: rpc: command not found
bash: daemon: command not found
postfix/postfix-script: fatal: usage: postfix start (or stop, reload, abort, 
flush, or check)

Can you suggest what technique should I use to achieve my results. I would 
prefer to do it with minimal touch of controlled hosts if possible.
I will be also thankful for other ideas/hints.
Thanks in advance for your attention.


Regards,
Marian



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