2-nginx常用命令

查看nginx配置文件路径 nginx -t

查看nginx进程 ps -ef | grep nginx

检测配置文件规则
nginx -c /etc/nginx/default.d/websocket.conf

改完配置后需要reload nginx -s reload

启动、停止、重载命令
systemctl start nginx.service
systemctl stop nginx.service
systemctl reload nginx.service
systemctl status nginx.service

nginx错误解决办法

1 重启电脑后，执行nginx -s reload时报错 nginx: [error] open() "/var/run/nginx.pid" failed (2: No such file or directory)
执行nginx -c /etc/nginx/nginx.conf搞定

[root@localhost nginx]# nginx -s reload
nginx: [error] open() "/var/run/nginx.pid" failed (2: No such file or directory)
[root@localhost nginx]# nginx -c /etc/nginx/nginx.conf
[root@localhost nginx]# nginx -s reload
[root@localhost nginx]# 

如果执行nginx -c /etc/nginx/nginx.conf还报错

[root@instance-ww74cmok-2 nginx]# nginx -c /etc/nginx/nginx.conf
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
nginx: [emerg] bind() to [::]:443 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:443 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
nginx: [emerg] bind() to [::]:443 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:443 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
nginx: [emerg] bind() to [::]:443 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:443 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
nginx: [emerg] bind() to [::]:443 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:443 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
nginx: [emerg] bind() to [::]:443 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:443 failed (98: Address already in use)
nginx: [emerg] still could not bind()

方法1：杀掉这个进程（慎重！！！，这个命令杀掉整个主机所有带有nginx的进程，包括docker容器启动的nginx镜像）
killall -9 nginx
systemctl start nginx.service

方法2：
-------------reload报错信息： nginx: [error] open() "/var/run/nginx.pid" failed (2: No such file or directory)
这个意思是在对应路径下找不到nginx的进程id，所以在/var/run目录下，新建一个nginx.pid文件，里面写上nginx的进程id即可（master process对应的那个id）

图片.png

代码

cd /var/run
touch nginx.pid
输入nginx的进程id（master process对应的那个id）
nginx -s reload

方法3：
找到所有的nginx进程，一个一个的杀掉，再重启nginx