#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