1.建立服务文件

vim /usr/lib/systemd/system/nginx.service 

服务文件内容

1.nginx.service

[Unit]

Description=nginx - high performance web server

After=network.target remote-fs.target nss-lookup.target

[Service]

Type=forking

ExecStart=/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf

ExecReload=/usr/local/nginx/sbin/nginx -s reload

ExecStop=/usr/local/nginx/sbin/nginx -s stop

[Install]

WantedBy=multi-user.target

2.MySQL.service

[Unit]

Description=mysql

After=network.target remote-fs.target nss-lookup.target

[Service]

Type=forking

ExecStart=/usr/local/mysql/support-files/mysql.server start

#ExecReload=/usr/local/mysql/support-files/mysql.server restart

#ExecStop=/usr/local/mysql/support-files/mysql.server stop

#PrivateTmp=true

[Install]

WantedBy=multi-user.target

PHP-fpm.service

[Unit]

Description=php

After=network.target remote-fs.target nss-lookup.target

[Service]

Type=forking

ExecStart=/usr/local/php/sbin/php-fpm

[Install]

WantedBy=multi-user.target

Redis.service

[Unit]

Description=Redis

After=network.target remote-fs.target nss-lookup.target

[Service]

Type=forking

ExecStart=/usr/local/bin/redis-server /etc/redis.conf

ExecStop=kill -INT `cat /tmp/redis.pid`

User=www

Group=www

[Install]

WantedBy=multi-user.target

supervisord.service

[Unit]

Description=Process Monitoring and Control Daemon

After=rc-local.service

[Service]

Type=forking

ExecStart=/usr/bin/supervisord -c /etc/supervisord.conf

SysVStartPriority=99

[Install]

WantedBy=multi-user.target

文件内容解释

[Unit]:服务的说明

Description:描述服务

After:描述服务类别

[Service]服务运行参数的设置

Type=forking是后台运行的形式

ExecStart为服务的具体运行命令

ExecReload为重启命令

ExecStop为停止命令

PrivateTmp=True表示给服务分配独立的临时空间

注意：启动、重启、停止命令全部要求使用绝对路径

[Install]服务安装的相关设置，可设置为多用户

2.保存目录

以754的权限保存在目录：

/usr/lib/systemd/system 

3.设置开机自启动

任意目录下执行

systemctl enable nginx.service

4.其他命令

启动nginx服务

systemctl start nginx.service

设置开机自启动

systemctl enable nginx.service

停止开机自启动

systemctl disable nginx.service

查看服务当前状态

systemctl status nginx.service

重新启动服务

systemctl restart nginx.service

查看所有已启动的服务

systemctl list-units --type=service