演示环境
[root@centos7-router ~]# more /etc/redhat-release
CentOS Linux release 7.2.1511 (Core)

[root@centos7-router ~]# vim /etc/yum.repos.d/nginx.repo

[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/OS/OSRELEASE/$basearch/
gpgcheck=0
enabled=1

将上述配置文件中的OS替换为rhel或者centos，OSRELEASE替换为6或者7，即当前的Linux为6还是7版本

查看本机ip
[root@centos7-router ~]# ip addr|grep inet|grep global
inet 172.24.8.254/24 brd 172.24.8.255 scope global eno16777728
inet 192.168.1.175/24 brd 192.168.1.255 scope global dynamic eno33554960

[root@centos7-router ~]# yum install nginx -y
[root@centos7-router ~]# yum install nginx-module-perl.x86_64 -y 

查看生程的相关文件
[root@centos7-router ~]# rpm -ql nginx
/etc/logrotate.d/nginx
/etc/nginx
/etc/nginx/conf.d
/etc/nginx/conf.d/default.conf
/etc/nginx/fastcgi_params
/etc/nginx/koi-utf
/etc/nginx/koi-win
/etc/nginx/mime.types
/etc/nginx/modules
/etc/nginx/nginx.conf
/etc/nginx/scgi_params
/etc/nginx/uwsgi_params
/etc/nginx/win-utf
/etc/sysconfig/nginx
/etc/sysconfig/nginx-debug
/usr/lib/systemd/system/nginx-debug.service
/usr/lib/systemd/system/nginx.service
/usr/lib64/nginx
/usr/lib64/nginx/modules
/usr/libexec/initscripts/legacy-actions/nginx
/usr/libexec/initscripts/legacy-actions/nginx/check-reload
/usr/libexec/initscripts/legacy-actions/nginx/upgrade
/usr/sbin/nginx
/usr/sbin/nginx-debug
/usr/share/doc/nginx-1.12.2
/usr/share/doc/nginx-1.12.2/COPYRIGHT
/usr/share/man/man8/nginx.8.gz
/usr/share/nginx
/usr/share/nginx/html
/usr/share/nginx/html/50x.html
/usr/share/nginx/html/index.html
/var/cache/nginx
/var/log/nginx

启动nginx
root@centos7-router ~]# systemctl start nginx
[root@centos7-router ~]# systemctl enable nginx ###配置自启动
[root@centos7-router ~]# ss -nltp|grep nginx
LISTEN 0 128 *:80 *:* users:(("nginx",pid=65418,fd=6),("nginx",pid=65415,fd=6))

查看nginx的版本
[root@centos7-router ~]# nginx -v
nginx version: nginx/1.12.2

查看或修改配置文件
[root@centos7-router ~]# more /etc/nginx/nginx.conf

user nginx;
worker_processes 1;

error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;

events {
worker_connections 1024;
}

http {
include /etc/nginx/mime.types;  ### Author : Leshami
default_type application/octet-stream; ### Blog : http://blog.csdn.net/leshami

log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';

access_log /var/log/nginx/access.log main;

sendfile on;
#tcp_nopush on;

keepalive_timeout 65;

#gzip on;

include /etc/nginx/conf.d/*.conf;
}

[root@centos7-router ~]# firewall-cmd --add-service=http --permanent
[root@centos7-router ~]# firewall-cmd --reload

从其他机器验证nginx
[root@centos7-web ~]# curl http://172.24.8.254







Welcome to nginx!
If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.

For online documentation and support please refer to
nginx.org.

Commercial support is available at
nginx.com.

Thank you for using nginx.