Using ps to Monitor Processes
June 2nd, 2009 by Janos Gyerik in
In a previous tech tip, we saw how to use kill to monitor processes. Another option is to use ps. With both methods, you can check $? for success/failure. However, note that kill -0 may return failure even if the process actually exists. This happens when the current user has no permission to the process in question, for example: kill -0 1.
To check for a process silently (with no output), use:
kill -0 PID 2>/dev/null ps -p PID >/dev/null
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December 2009, #188
If last month's Infrastrucuture issue was too "big" for you then try on this month's Embedded issue. Find out how to use Player for programming mobile robots, build a humidity controller for your root cellar, find out how to reduce the boot time of your embedded system, and if you're new to embedded systems find out the basics that go into one. You can also read about the Beagle Board, the Mesh Potato and a spate of other interestingly named items. And along with our regular columns don't miss our new monthly column: Economy Size Geek.
I tend to use the command
On June 4th, 2009 Anonymous says:
I tend to use the command "pgrep process-pattern". It seems to do the trick as well and has many options to tailor command behaviour.
I like this how2
On June 3rd, 2009 Anonymous (not verified) says:
I like this how2
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