[root@localhost ~]# cat /etc/redhat-release
CentOS Linux release  (Core)
[root@localhost ~]# uname -a
Linux localhost.localdomain -.el7.x86_64 # SMP Thu Nov  :: UTC  x86_64 x86_64 x86_64 GNU/Linux

[root@localhost opt]# yum -y install openssl openssl-devel zlib zlib-devel pcre pcre-devel make gcc gcc-c++

[root@localhost ~]# cd /opt/
[root@localhost opt]# wget http://nginx.org/download/nginx-1.17.6.tar.gz
[root@localhost opt]# .tar.gz
[root@localhost opt]# cd nginx-/
[root@localhost opt]# cd nginx-/
[root@localhost nginx-]#
[root@localhost nginx-]# ls
auto CHANGES CHANGES.ru conf configure contrib html LICENSE man README src
[root@localhost nginx-]# ./configure --prefix=/usr/local/nginx && make && make install

[root@localhost nginx-]# cd /usr/local/nginx/
[root@localhost nginx]# ls
conf html logs sbin
[root@localhost nginx]# cd sbin/
[root@localhost sbin]# ./nginx
[root@localhost sbin]# netstat -anpl | grep nginx    //查看端口
tcp    /nginx: master
unix  [ ] STREAM CONNECTED  /nginx: master
unix  [ ] STREAM CONNECTED  /nginx: master
[root@localhost sbin]# ps aux | grep nginx    //查看进程
jia    ? Sl : : /usr/libexec/ibus-engine-simple
root    ? Ss : : nginx: master process ./nginx
nobody    ? S : : nginx: worker process
root    pts/ S+ : : grep --color=auto ngin

[root@localhost sbin]# ln nginx /usr/local/sbin/
[root@localhost ~]# nginx -t    //检查nginx语法
nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
[root@localhost ~]# nginx -s stop    //停止nginx
[root@localhost ~]# which nginx    //查看启动程序位置
/usr/local/sbin/nginx

[root@localhost ~]# cat /etc/rc.local //文件存放在/etc目录下

下面时rc.local的文件内容：

#!/bin/bash
# THIS FILE IS ADDED FOR COMPATIBILITY PURPOSES
#
# It is highly advisable to create own systemd services or udev rules
# to run scripts during boot instead of using this file.
#
# In contrast to previous versions due to parallel execution during boot
# this script will NOT be run after all other services.
#
# Please note that you must run 'chmod +x /etc/rc.d/rc.local' to ensure
# that this script will be executed during boot.
touch /var/lock/subsys/local

[root@localhost ~]# echo sh /usr/local/nginx/sbin/nginx >> /etc/rc.local
[root@localhost ~]# cat /etc/rc.local
#!/bin/bash
# THIS FILE IS ADDED FOR COMPATIBILITY PURPOSES
#
# It is highly advisable to create own systemd services or udev rules
# to run scripts during boot instead of using this file.
#
# In contrast to previous versions due to parallel execution during boot
# this script will NOT be run after all other services.
#
# Please note that you must run 'chmod +x /etc/rc.d/rc.local' to ensure
# that this script will be executed during boot.
touch /var/lock/subsys/local
/usr/local/nginx/sbin/nginx
如果你上面把nginx设置为系统命令那你就可以直接写命令就好了
nginx

[root@localhost ~]# reboot
重启后发现nginx自动启动了
[root@localhost ~]# netstat -anpl | grep nginx
tcp    /nginx: master
unix  [ ] STREAM CONNECTED  /nginx: master
unix  [ ] STREAM CONNECTED  /nginx: master
[root@localhost ~]# ps aux | grep nginx
root    ? Ss : : nginx: master process /usr/local/nginx/sbin/nginx
nobody    ? S : : nginx: worker process
root    pts/ S+ : : grep --color=auto nginx
[root@localhost ~]# 

默认配置文件有这一条，如果没有请在nginx.conf中找到这一条然后将前面注释删除就可以了
pid logs/nginx.pid;

[root@localhost system]# cat nginx.service
[Unit]
Description=nginx    //描述
After=syslog.target network.target remote-fs.target nss-lookup.target    \\描述服务类别

[Service]
Type=forking    //设置运行方式，后台运行
PIDFile=/usr/local/nginx/logs/nginx.pid    //设置PID文件
ExecStart=/usr/local/nginx/sbin/nginx    //启动命令
ExecReload=/bin/kill -s HUP $MAINPID    //重启命令
ExecStop=/bin/kill -s QUIT $MAINPID    //关闭命令
PrivateTmp=true    //分配独立的临时空间
*注意命令需要写绝对路径
[Install]    ///服务安装的相关设置，可设置为多用户
WantedBy=multi-user.target    

[root@localhost ~]# systemctl start nginx    //启动服务
[root@localhost ~]# netstat -anpl | grep nginx
tcp    /nginx: master
unix  [ ] STREAM CONNECTED  /nginx: master
unix  [ ] STREAM CONNECTED  /nginx: master
[root@localhost ~]# systemctl stop nginx    //关闭服务
[root@localhost ~]# netstat -anpl | grep nginx
[root@localhost ~]# systemctl restart nginx    //重新启动服务
[root@localhost ~]# netstat -anpl | grep nginx
tcp    /nginx: master
unix  [ ] STREAM CONNECTED  /nginx: master
unix  [ ] STREAM CONNECTED  /nginx: master 

[root@localhost ~]# systemctl enable nginx
Created symlink from /etc/systemd/system/multi-user.target.wants/nginx.service to /usr/lib/systemd/system/nginx.service.
[root@localhost ~]# systemctl enable nginx

[root@localhost ~]# netstat -anpl | grep nginx
tcp    /nginx: master
unix  [ ] STREAM CONNECTED  /nginx: master
unix  [ ] STREAM CONNECTED  /nginx: master 

#!/bin/bash
# chkconfig:       //启动顺序
# description: start the nginx deamon    //说明
# Source function library
. /etc/rc.d/init.d/functions

prog=nginx
# 根据自己的路径改写CATALANA_HOME
CATALANA_HOME=/usr/local/nginx
export CATALINA_HOME

case "$1" in
start)
echo "Starting nginx..."
$CATALANA_HOME/sbin/nginx
;;

stop)
echo "Stopping nginx..."
$CATALANA_HOME/sbin/nginx -s stop
;;

restart)
echo "Stopping nginx..."
$CATALANA_HOME/sbin/nginx -s stop

echo
echo "Starting nginx..."
$CATALANA_HOME/sbin/nginx
;;
*)
echo "Usage: $prog {start|stop|restart}"
;;
esac
exit 

[root@localhost ~]# chmod +x /etc/init.d/nginx    //设置执行权限

[root@localhost init.d]# service nginx start    //启动nginx
Starting nginx (via systemctl): [ 确定 ]
[root@localhost init.d]# netstat -anpl | grep nginx
tcp    /nginx: master
unix  [ ] STREAM CONNECTED  /nginx: master
unix  [ ] STREAM CONNECTED  /nginx: master
[root@localhost init.d]# service nginx stop    //关闭nginx
Stopping nginx (via systemctl): [ 确定 ]
[root@localhost init.d]# netstat -anpl | grep nginx
[root@localhost init.d]# service nginx restart //重新启动nginx
Restarting nginx (via systemctl): [ 确定 ]
[root@localhost init.d]# netstat -anpl | grep nginx
tcp    /nginx: master
unix  [ ] STREAM CONNECTED  /nginx: master
unix  [ ] STREA