Linux pidof命令使用总结_Linux

Linux pidof命令使用总结

2021-10-11 16:00Linux教程网 Linux

今天GoFace给大家介绍linux pidof命令的用法，pidof命令大家或许很少见过，不过在适当的场合用处还是不小的

一、什么是pidof命令？

复制代码代码如下:

	#man pidof中的解释：

	pidof — find the process ID of a running program.

	pidof–用于查找一个运行的程序的PID。

	pidof is actually the same program as killall5;

	[root@GoGo ~]# ls -l /sbin/pidof

	lrwxrwxrwx. 1 root root 8 Aug 25 00:40 /sbin/pidof -> killall5 //的确如此。

二、pidof命令的参数
-s 表示只返回1个 pid
-x 表示同时返回运行给定程序的 shell 的 pid
-o 表示告诉 piod 表示忽略后面给定的 pid ，可以使用多个 -o 。
pidof is simply a (symbolic) link to the killall5 program, which should also be located in /sbin.
When pidof is invoked with a full pathname to the program it should find the pid of, it is reasonably safe. Otherwise it
is possible that it returns pids of running programs that happen to have the same name as the program you're after but are
actually other programs.
如果是一个 fullpath 则 pidof 不会出错，但如果不是则有可能返回和给定同名的程序。

三、pidof命令使用实例

复制代码代码如下:

	[root@GoGo ~]# pidof nginx

	1476 1475 1473 1472 1471 1470 1469 1467 1466

	[root@GoGo ~]# ps -ef | grep nginx

	nginx     1450  1449  0 20:16 ?        00:00:00 php-fpm: pool www

	nginx     1451  1449  0 20:16 ?        00:00:00 php-fpm: pool www

	nginx     1452  1449  0 20:16 ?        00:00:00 php-fpm: pool www

	nginx     1453  1449  0 20:16 ?        00:00:00 php-fpm: pool www

	nginx     1454  1449  0 20:16 ?        00:00:00 php-fpm: pool www

	root      1466     1  0 20:16 ?        00:00:00 nginx: master process /usr/sbin/nginx -c /etc/nginx/nginx.conf

	nginx     1467  1466  0 20:16 ?        00:00:00 nginx: worker process

	nginx     1469  1466  0 20:16 ?        00:00:00 nginx: worker process

	nginx     1470  1466  0 20:16 ?        00:00:00 nginx: worker process

	nginx     1471  1466  0 20:16 ?        00:00:00 nginx: worker process

	nginx     1472  1466  0 20:16 ?        00:00:00 nginx: worker process

	nginx     1473  1466  0 20:16 ?        00:00:00 nginx: worker process

	nginx     1475  1466  0 20:16 ?        00:00:00 nginx: worker process

	nginx     1476  1466  0 20:16 ?        00:00:00 nginx: worker process

	root      2234  2141  0 20:24 pts/1    00:00:00 grep nginx

	[root@GoGo ~]# ps -ef | grep nginx | awk '{print $2}'

	1450

	1451

	1452

	1453

	1454

	1466

	1467

	1469

	1470

	1471

	1472

	1473

	1475

	1476

	2237

	[root@GoGo ~]# pidof -s nginx

	1476

	[root@GoGo ~]# pidof sshd

	2139 1163

	[root@GoGo ~]# ps -ef | grep sshd

	root      1163     1  0 20:16 ?        00:00:00 /usr/sbin/sshd

	root      2139  1163  0 20:20 ?        00:00:00 sshd: root@pts/1