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Possible Duplicate:
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

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

up vote 3 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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