./nginx 启动nginx，在启动时报错端口被占用

[root@localhost sbin]# ./nginx
nginx: [emerg] bind() to 0.0.0.0:7001 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:7001 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:7001 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:7001 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:7001 failed (98: Address already in use)

lsof -i:7001,查看被占用的进程

[root@localhost sbin]# lsof -i:7001
COMMAND    PID USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
java    104324 root 1514u  IPv6 822256      0t0  TCP localhost.localdomain:afs3-callback (LISTEN)
java    104324 root 1515u  IPv6 811847      0t0  TCP localhost:afs3-callback (LISTEN)
java    104324 root 1516u  IPv6 810961      0t0  TCP localhost:afs3-callback (LISTEN)
java    104324 root 1517u  IPv6 810962      0t0  TCP localhost.localdomain:afs3-callback (LISTEN)
java    104324 root 1518u  IPv6 822257      0t0  TCP localhost.localdomain:afs3-callback (LISTEN)

解决办法：

方法一：如果涉及的进程不需要则将它杀死，杀死后./nginx重新启动nginx，80端口同理

[root@localhost nginx]# kill -9 7001[root@localhost sbin]# ./nginx

方法二：涉及进程需要，则修改端口

进入sbin目录下修改nginx.conf文件

修改前：

server {listen      7001;server_name  localhost;

修改后：

将listen端口改为其他端口

server {listen      17001;server_name  localhost;

 ./nginx 重新启动nginx

[root@localhost sbin]# ./nginx

ps -ef | grep nginx查看进程：已启动

[root@localhost sbin]# ps -ef | grep nginx
root     106562      1  0 23:19 ?        00:00:00 nginx: master process ./nginx
nobody   106563 106562  0 23:19 ?        00:00:00 nginx: worker process
nobody   106564 106562  0 23:19 ?        00:00:00 nginx: worker process
root     106568 106205  0 23:19 pts/0    00:00:00 grep --color=auto nginx