grep help


 
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# 1  
grep help

I want to have output of grep if not found should throw error:

For eg, below command if value not found will not throw error
$ ssh -q root@s22384.esco.com "ulimit -m | grep -E 450000"
root@asctel.co's password: **

wheres the below will throw error, as there is no command
ssh -q root@s22384 "alimit -m | grep -E 450000"
root@s22384's password: **


so all i want is if word in grep is not found should throw error.

Thanks,
# 2  
What are you trying to do overall? In your second example it is your remote shell that prints the message about command not found, not grep. ssh will also exit with the remote commands exit status. You could use that to produce/control your own output ... For example:

Code:
ssh -q root@s22384.esco.com "ulimit -m | grep -E 450000" || echo 'not found' >&2

# 3  
Thanks scott , theres a change in requirement working towards that
 

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