Linux下如何查看进程准确启动时间

ps：process status

for pid in $(pgrep httpd); do echo -n "${pid} " ; ps -p ${pid} -o lstart | grep -v "START" ; done

ps -eo pid,lstart,etime,cmd | grep nginx

-e  Display information about other users' processes, including those without controlling ter-
             minals.
-o  Display information associated with the space or comma separated list of keywords speci-
             fied.  Multiple keywords may also be given in the form of more than one -o option.  Key-
             words may be appended with an equals (`=') sign and a string.  This causes the printed
             header to use the specified string instead of the standard header.  If all keywords have
             empty header texts, no header line is written.

       lstart      STARTED   time the command started.  See also bsdstart, start, start_time, and stime.

       etime       ELAPSED   elapsed time since the process was started, in the form [[DD-]hh:]mm:ss.


man -a ps查看ps的命令行手册帮助信息