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As an alternative to using an additional grep -v grep you can use a simple regular expression in the search pattern (first letter is something out of the single letter list ;-)) to drop the grep command itself.
There is 1 alternative - vote for the best!
Trick to avoid the form:
grep process | grep - v grep
preferred way to query ps for a specific process name (not supported with all flavors of ps, but will work on just about any linux afaik)
This does the same thing as many of the 'grep' based alternatives but allows a more finite control over the output. For example if you only wanted the process ID you could change the command:
ps -ef | awk '/mingetty/ && !/awk/ {print $2}'
If you wanted to kill the returned PID's:
ps -ef | awk '/mingetty/ && !/awk/ {print $2}' | xargs -i kill {}
If you can do better, submit your command here.
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Why does it work?
I think I understand now, it's cause it appears exactly as "[p]rocess-name" in the process list.
correctly :D
it works because "[p]rocess name" is really a regular expression which matches "process name" but not "grep [p]rocess name" because only grep interprets the [ and ] characters specially. The brackets form a character class: http://www.regular-expressions.info/charclass.html
wicked, thanks for sharing this
That was brilliant. Very cool.
This is so helpful.
I have been working on a script to capture memeory usage of a few processes that launch child processes at intervals. This helps clean up the logs I am capturing.
Thanks!!! :-D
PS how did you guys get a custom avatar?
@DaveQB it's gravatar (gravatar.com). I had to go to my profile and re-save for it to work.
why this not work on zsh?
ps axu | grep [a]pache2zsh: no matches found: [a]pache2
zsh --versionzsh 4.3.17 (x86_64-unknown-linux-gnu)