ps -p PID -o lstart
Among them, PID is the process ID number of a process .
E.g:
bash-3.2$ ps -p 16310 -o lstart STARTED Sun Jul 12 02:00:01 2015
ps -p PID -o lstart
Among them, PID is the process ID number of a process .
E.g:
bash-3.2$ ps -p 16310 -o lstart STARTED Sun Jul 12 02:00:01 2015