Linux 启动 Apache 时报错：(98)Address already in use: make_sock: could not bind to address [::]:80

1. 启动 Apache 时报错：

[root@localhost sh]# service httpd start
Starting httpd: httpd: Could not reliably determine the server's fully qualified domain name, using localhost.localdomain for ServerName
(98)Address already in use: make_sock: could not bind to address [::]:80
(98)Address already in use: make_sock: could not bind to address 0.0.0.0:80
no listening sockets available, shutting down
Unable to open logs
                                                           [FAILED]

2. 查询到 80 端口被 nginx 占用：

[root@localhost sh]# netstat -tulnp | grep ":80"
tcp        0      0 0.0.0.0:80                  0.0.0.0:*                   LISTEN      1327/nginx

3. 找到 nginx 的进程号：

[root@localhost sh]# ps -ef | grep nginx
root      1327     1  0 11:35 ?        00:00:00 nginx: master process /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
www       1329  1327  0 11:35 ?        00:00:00 nginx: worker process                                          
root      3902  1789  0 14:41 pts/0    00:00:00 grep --color=auto nginx

4. 杀掉进程：

[root@localhost sh]# kill -9 1327
[root@localhost sh]# kill -9 1329

5. 重新开启 Apache：

[root@localhost sh]# service httpd start
Starting httpd: httpd: Could not reliably determine the server's fully qualified domain name, using localhost.localdomain for ServerName
                                                           [  OK  ]