如何安装nginx

$ sudo yum install epel-release && yum install nginx   ### CentOS/RHEL
$ sudo dnf install nginx                               ### Debian/Ubuntu
$ sudo apt install nginx                               ### Fedora

如何查看nginx的版本

$ nginx -v

nginx version: nginx/1.12.2

查看nginx版本和配置选项

$ nginx -V

nginx version: nginx/1.12.2
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-16) (GCC) 
built with OpenSSL 1.0.2k-fips  26 Jan 2017
TLS SNI supp或者t enabled
configure arguments: --prefix=/usr/share/nginx --sbin-path=/usr/sbin/nginx

如何检查Nginx配置文件语法是否正确

$ sudo nginx -t

nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful

如何启动nginx服务

$ sudo systemctl start nginx ###systemd
或者
$ sudo service nginx start   ###sysvinit

如何设置nginx开机自启动

$ sudo systemctl enable nginx #systemd
或者
$ sudo service nginx enable   #sysv init

如何重启nginx服务

$ sudo systemctl restart nginx #systemd
或者
$ sudo service nginx restart   #sysv init

如何检查nginx状态

$ sudo systemctl status nginx #systemd
或者
$ sudo service nginx status   #sysvinit

如何重新加载nginx配置而不影响当前服务

$ sudo systemctl reload nginx #systemd
或者
$ sudo service nginx reload   #sysvinit

如何停止nginx服务

$ sudo systemctl stop nginx #systemd
或者
$ sudo service nginx stop   #sysvinit