linux 查看進程的運行時間

有些時候我們需要知道某個進程的啓動時間！ 

顯示某PID的啓動時間命令： 

1 ps -p PID -o lstart

舉例子

如下面顯示httpd的啓動時間： 

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

寫個小腳本，根據傳入的參數顯示對應進程的啓動時間 
比如運行：./show.sh  mysql 顯示mysql進程的啓動時間： 

Bash代碼  

#!/bin/bash
if [ -z $1  ]; then
    echo "please input ps keyword" && exit 1
fi
ps aux |grep $1 |grep -v "grep $1" |grep -v " $1" |while read line
do
    linewords=($line)
    pid="${linewords[1]}"
    START_TIME=$(ps -p ${pid} -o lstart | grep -v "START")
    echo "$line $START_TIME"
done