Linux Process Management – How to Check When a Process Started

linuxprocess

How can I see when a process started, assuming I know the pid. (On Linux)

Best Answer

If you want only the start time, you can select the field and suppress the header by doing this:

 ps -p YOURPID -o lstart=

the output will look like this:

 Mon Dec 14 17:17:16 2009

which is ctime(3) format and you can parse it to split out the relevant parts.

Other start fields such as start, stime, bsdstart and start_time age the time (after 24 hours only the date is shown, for example).

You can, however, use them directly for recently started processes without further parsing:

ps -p YOURPID -o stime=

which would output something like:

09:26
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