方法一
- grep进程名
[root@iZ25p102vo3Z ~]# ps -eo pid,lstart,etime,cmd | grep nginx
16968 Fri Mar 4 16:04:27 2016 41-21:14:04 nginx: master process /usr/sbin/nginx
17826 Fri Mar 4 22:53:51 2016 41-14:24:40 nginx: worker process
18312 Fri Apr 15 13:18:31 2016 00:00 grep --color=auto nginx
方法二
- 指定进程号
ps -p PID -o lstart,etime
参考：
https://jaminzhang.github.io/linux/using-ps-to-view-process-started-and-elapsed-time-in-linux/https://blog.51cto.com/leomars/1888213
