2021-03-16

关于服务启动

普通用户要是启动nginx报错，那就是端口号低于1024

检查语法
[dky@rebot sbin 13:53:06]$ ./nginx -t
nginx: the configuration file /home/dky/robot/nginx/nginx-server/conf/nginx.conf syntax is ok
nginx: [emerg] bind() to 0.0.0.0:80 failed (13: Permission denied)
nginx: configuration file /home/dky/robot/nginx/nginx-server/conf/nginx.conf test failed
启动nginx
[dky@rebot sbin 13:53:19]$ ./nginx
nginx: [emerg] bind() to 0.0.0.0:80 failed (13: Permission denied)

将端口号进行调整8080(大于1024即可)

报错如下：

检查语法
[dky@rebot sbin 14:00:32]$ ./nginx -t
nginx: the configuration file /home/dky/robot/nginx/nginx-server/conf/nginx.conf syntax is ok
nginx: configuration file /home/dky/robot/nginx/nginx-server/conf/nginx.conf test is successful
启动nginx
[dky@rebot sbin 14:00:47]$ ./nginx
nginx: [emerg] bind() to 0.0.0.0:8080 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:8080 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:8080 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:8080 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:8080 failed (98: Address already in use)
nginx: [emerg] still could not bind()
查看端口
[dky@rebot sbin 14:00:59]$ netstat -lantup
tcp        0      0 0.0.0.0:8080            0.0.0.0:*               LISTEN      8806/nginx: master
启动成功

综上所述：非root用户启动一个服务，端口号大于1024才能起来，否则premission denied .