nginx 启动时报错Starting nginx (via systemctl): nginx.servic

报错提示：

Starting?nginx?(via?systemctl):?nginx.serviceJob?for?nginx.service?failed?because?the?control?process?exited?with?error?code.
?See?"systemctl?status?nginx.service"?and?"journalctl?-xe"?for?details.

问题出现原因：

创建配置文件是在/etc/nginx/conf.d这个目录系下，文件名是：city.conf，使用/etc/init.d/nginx reload 命令时提示的错误

配置文件内容：

server?{???#?这个server标识我要配置了
????????listen?80;
????????server_name?192.168.17.129?;
????????access_log??/var/log/nginx/access.log??main;
????????charset??utf-8;
????????gzip?on;
????????gzip_types?text/plain?application/x-javascript?text/css?text/javascript?application/x-httpd-php?application/json?text/json?image/jpeg?image/gif?image/png?application/octet-stream;

????????error_page??404???????????/404.html;
????????error_page???500?502?503?504??/50x.html;

????????#?指定项目路径uwsgi
????????location?/?{????????#?这个location就和咱们Django的url(r'^admin/',?admin.site.urls),????????????include?uwsgi_params;??#?导入一个Nginx模块他是用来和uWSGI进行通讯的
????????????uwsgi_connect_timeout?30;??#?设置连接uWSGI超时时间
????????????uwsgi_pass?unix:/home/script/uwsgi.sock;??#?指定uwsgi的sock文件所有动态请求就会直接丢给他
????????}

????????#?指定静态文件路径
????????location?/static/?{
????????????alias??/home/trunk/static/;
????????????index??index.html?index.htm;
????????}

解答经过：

? ? ? ? 网上说这种错误一般都是目录不存在或者权限不足，所以直接执行下面两条命令即可，结果发现根本行不通。

[root@typecodes?~]#?cd?/var/tmp/

[root@typecodes?~]#?mkdir?-p?/var/tmp/nginx/{client,proxy,fastcgi,uwsgi,scgi}

最终解决办法：

? ? ? ? 1. 使用以下命令，得到错误提示如下：

$?systemctl?status?nginx.service

nginx.service?-?A?high?performance?web?server?and?a?reverse?proxy?server
???Loaded:?loaded?(/lib/systemd/system/nginx.service;?enabled;?vendor?preset:?enabled)
???Active:?failed?(Result:?exit-code)?since?Tue?2017-08-22?04:12:48?PDT;?31min?ago
??Process:?7030?ExecStop=/sbin/start-stop-daemon?--quiet?--stop?--retry?QUIT/5?--pidfile?/run/nginx.pid?(code=exited,?status=0
??Process:?6525?ExecReload=/usr/sbin/nginx?-g?daemon?on;?master_process?on;?-s?reload?(code=exited,?status=1/FAILURE)
??Process:?6957?ExecStart=/usr/sbin/nginx?-g?daemon?on;?master_process?on;?(code=exited,?status=0/SUCCESS)
??Process:?7174?ExecStartPre=/usr/sbin/nginx?-t?-q?-g?daemon?on;?master_process?on;?(code=exited,?status=1/FAILURE)
?Main?PID:?6961?(code=exited,?status=0/SUCCESS)

Aug?22?04:12:48?ubuntu?systemd[1]:?Starting?A?high?performance?web?server?and?a?reverse?proxy?server...
Aug?22?04:12:48?ubuntu?nginx[7174]:?nginx:?[emerg]?unknown?log?format?"main"?in?/etc/nginx/conf.d/city.conf:4Aug?22?04:12:48?ubuntu?nginx[7174]:?nginx:?configuration?file?/etc/nginx/nginx.conf?test?failed
Aug?22?04:12:48?ubuntu?systemd[1]:?nginx.service:?Control?process?exited,?code=exited?status=1Aug?22?04:12:48?ubuntu?systemd[1]:?Failed?to?start?A?high?performance?web?server?and?a?reverse?proxy?server.
Aug?22?04:12:48?ubuntu?systemd[1]:?nginx.service:?Unit?entered?failed?state.
Aug?22?04:12:48?ubuntu?systemd[1]:?nginx.service:?Failed?with?result?'exit-code'.
lines?1-16/16?(END)

? ? ? ? 2. 根据错误提示发现是access_log 后面多了一个main错误。手动删除配置文件中main，解决了该问题

反思：

? ? ? ? 多看英文，多看错误提示

（编辑：李大同）

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