在Mac上用brew安装Nginx，然后修改Nginx配置文件，再重启时报出如下错误： nginx: [error] invalid PID number "" in "/usr/local/var/run/nginx/nginx.pid" 这是因为nginx压根还未启动 解决办法： ``` $ sudo nginx -c /usr/local/etc/nginx/nginx.conf $ sudo nginx -s reload ``` nginx加入开机启动 在/Library/LaunchDaemons 新建nginx.plist文件，写入一下内容 ``` <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>Label</key><string>nginx</string> <key>Program</key><string>/usr/local/bin/nginx</string> <key>KeepAlive</key><true/> <key>NetworkState</key><true/> <key>WorkingDirectory</key><string>/usr/local/etc/nginx</string> <key>StandardErrorPath</key><string>/usr/local/etc/nginx/logs/error.log</string> <key>StandardOutPath</key><string>/usr/local/etc/nginx/logs/access.log</string> <key>LaunchOnlyOnce</key><true/> </dict> </plist> ``` 然后执行就可以了 ``` sudo launchctl load /Library/LaunchDaemons/nginx.plist ```