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May 19, 2015 - A Look At The New Commandlinefu
I've put together a short writeup on what kind of newness you can expect from the next iteration of clfu. Check it out here.
March 2, 2015 - New Management
I'm Jon, I'll be maintaining and improving clfu. Thanks to David for building such a great resource!

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Print out which hosts are not running specific process

Terminal - Print out which hosts are not running specific process
for i in `cat hosts_list`; do RES=`ssh [email protected]${i} "ps -ef " |awk '/[p]rocessname/ {print $2}'`; test "x${RES}" = "x" && echo $i; done
2014-10-03 14:57:54
User: arlequin
Functions: awk echo test
Print out which hosts are not running specific process

Given a hosts list, ssh one by one and echo its name only if 'processname' is not running.


There are 3 alternatives - vote for the best!

Terminal - Alternatives

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What others think

I'd make a few changes...

First $(command) is better than `command` because they can be nested.

Nice use of awk, but pgrep lives in the same package as ps and it's simpler.

Then I've moved the test onto the remote server so that I can just use || (or).

for i in $(cat hosts_list); do ssh [email protected]$i "pgrep iodined > /dev/null || echo $i"; done
Comment by flatcap 180 weeks and 5 days ago

@flatcap: Great improvement, thank you! Simplicity is the key!

Although, pgrep isn't a standard Unix tool and I use to check AIX systems:

for i in $(cat hosts_list); do ssh [email protected]${i} "ps -ef |grep [p]rocessname > /dev/null || echo $i"; done
Comment by arlequin 180 weeks and 1 day ago

Your point of view

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