How to get the start time of a process

[Patrick O'Callaghan]

On Fri, 2010-03-12 at 16:57 +0100, Dario Lesca wrote:
> Hi, how to get from a Shell the date that was start a process?
> 
> Then command: "ps h -ostime $$"
> show a value not usable for me (14:13 or May22 or 2009)
> 
> The command: "awk '{print $22}' /proc/$$/stat"
> show The time in jiffies the process started after system boot (es
> 1563950) and I do not known how to convert it in date/time.
> 
> I want to find all processes older than n-days and send them a special
> signal

atop (yum install atop) shows the start date and time to 1-minute
resolution (type 'v' in interactive mode). You can also run it
non-interactively.

poc