Details about a process and time it was running
Details about a process
ps axfu
ps -p <PID>
How long it has been running
ps -p {PID-HERE} -o etime # H:M:S
ps -p {PID-HERE} -o etimes # seconds
ps axfu
ps -p <PID>
ps -p {PID-HERE} -o etime # H:M:S
ps -p {PID-HERE} -o etimes # seconds