http启动（重启）报错：Job for httpd.service failed because the control process exited with error code.

【问题】

1、http启动（重启）报错

systemctl start httpd

Job for httpd.service failed because the control process exited with error code. See "systemctl status httpd.service" and "journalctl -xe" for details.

【解决方案】

1、用systemctl status httpd.service查看，发现80端口被占用

systemctl status httpd.service

2、用netstat -antlp | grep 80查看端口被哪一服务占用

netstat -antlp | grep 80

由图看到是squid服务占用了80端口

3、关闭squid服务，再次启动，成功！

[root@web1 ~]# systemctl stop squid.service 
[root@web1 ~]# systemctl start httpd