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How to check how a long a program has been running?

I am interested in doing this purely using bash.

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marked as duplicate by Michael Mrozek Aug 23 '11 at 3:08

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1 Answer 1

up vote 2 down vote accepted

ps can fit your needs:

ps -eo pid,command,etime

To get information for a specific process:

ps -o command,etime -p PID
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