首次启动nginx出错

启动nginx提示Job for nginx.service failed because the control process exited with error code.

但是google后各个博客和问答(包括我)基本都是针对自己的问题给出解决方案,解决这个问题，建议根据提示，使用提示命令定位确切的错误原因。

常见的错误一般有：1.配置文件有错误 2.端口被占用

2020.1.18

服务器是Centos7,yum intstall nginx后,根据ObjectSpace的博客没有直接启动nginx后报错:Job for nginx.service failed because the control process exited with error code. See "systemctl status nginx.service" and "journalctl -xe" for details.

给了两个提示命令,第一个是nginx的状态信息,第二个是日志,我们要使用的是第一个命令，用来定位错误的地方。

输入systemctl status nginx.service回车

   ● nginx.service - The nginx HTTP and reverse proxy serverLoaded: loaded (/usr/lib/systemd/system/nginx.service; disabled; vendor preset: disabled)Active: failed (Result: exit-code) since Sat 2020-01-18 10:46:46 CST; 2min 42s agoProcess: 13542 ExecStart=/usr/sbin/nginx (code=exited, status=1/FAILURE)Process: 13537 ExecStartPre=/usr/sbin/nginx -t (code=exited, status=0/SUCCESS)Process: 13536 ExecStartPre=/usr/bin/rm -f /run/nginx.pid (code=exited, status=0/SUCCESS)Jan 18 10:46:44 iZbp1895xh98o9mhkd21vjZ nginx[13542]: nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
Jan 18 10:46:45 iZbp1895xh98o9mhkd21vjZ nginx[13542]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Jan 18 10:46:45 iZbp1895xh98o9mhkd21vjZ nginx[13542]: nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
Jan 18 10:46:45 iZbp1895xh98o9mhkd21vjZ nginx[13542]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Jan 18 10:46:45 iZbp1895xh98o9mhkd21vjZ nginx[13542]: nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
Jan 18 10:46:46 iZbp1895xh98o9mhkd21vjZ nginx[13542]: nginx: [emerg] still could not bind()
Jan 18 10:46:46 iZbp1895xh98o9mhkd21vjZ systemd[1]: nginx.service: control process exited, code=exited status=1
Jan 18 10:46:46 iZbp1895xh98o9mhkd21vjZ systemd[1]: Failed to start The nginx HTTP and reverse proxy server.
Jan 18 10:46:46 iZbp1895xh98o9mhkd21vjZ systemd[1]: Unit nginx.service entered failed state.
Jan 18 10:46:46 iZbp1895xh98o9mhkd21vjZ systemd[1]: nginx.service failed.

问题所在：

nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)

检查端口是否被占用

netstat -tnlp

如果端口已经被占用，自己权衡一下是换个端口还是把占用端口的进程杀掉

检查nginx是否已经启动

ps -aux | grep nginx

如果已经启动使用下面命令干掉即可

pkill -9 nginx

重新启动nginx，done。

如果是因为配置文件有错误，输入systemctl status nginx.service回车应会看到类似于“server” directive is not allowed here in /etc/nginx/nginx.conf:35的错误，打开配置文档进行修改(参考博客benweilunochect)。

google同样的错误前两页的原因就有五六个且不一定能处理你的问题,因此遇错先看提示,然后再查文档或别人的blog。

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