Apache错误：Internal error: Error retrieving pid file logs/httpd.pid
启动apache时，出现20014错误:
[root@123 ~]# service httpd start
(20014)Internal error: Error retrieving pid file logs/httpd.pid
[root@123 ~]# echo 12345 > /usr/local/apache/logs/httpd.pid
[root@123 ~]# service httpd start
[root@123 ~]# service httpd start
(20014)Internal error: Error retrieving pid file logs/httpd.pid
Remove it before continuing if it is corrupted.
[root@123 ~]# echo 12345 > /usr/local/apache/logs/httpd.pid
[root@123 ~]# service httpd start
