psg (ps grep) function if you don't have pgrep or don't know how to use it

psg() { if [ -z "$2" ]; then psargs="aux"; greparg="$1"; else psargs="$1"; greparg="$2"; fi; ps $psargs | grep -i "$(echo $greparg | sed -e 's/^\(.\)/[\1]/')\|^$(ps $psargs | head -1)" ; }
My variant on this common function. Some highlights: Allows you to override the default ps args of "aux" Uses bracket trick to omit the grep process itself without having to use a second grep Always prints the correct header row of ps output Limitations: Ugly ps error output if you forget to quote your multi word grep argument
Sample Output
den:~ dre$ psg ssh
USER       PID %CPU %MEM      VSZ    RSS   TT  STAT STARTED      TIME COMMAND
dre      45705   0.0  0.0    75672   1000 s001  S+    2:44PM   0:00.04 ssh deinspanjer@server1
dre      45687   0.0  0.0    75736   1032 s000  S+    2:38PM   0:00.35 ssh deinspanjer@server2
dre        247   0.0  0.0    76764    840   ??  S     8Feb09   0:03.68 /usr/bin/ssh-agent -l

0
2009-02-18 20:57:17

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What Others Think

Some systems have similar utilities such as pgrep.
jsiren · 487 weeks and 2 days ago
And then... some don't. Is that any reason to downvote a script that is useful to people not blessed with pgrep?
DEinspanjer · 487 weeks and 2 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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