Linux pidof命令使用总结

#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。

[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