1.建立服务文件文件路径

···vim /usr/lib/systemd/system/nginxd.service
或者vim /etc/systemd/system/nginxd.service
···
服务文件内容
1.nginxd.service
[root@blog /etc/systemd/system]# cat nginxd.service
Unit
Description=nginx - high performance web server
After=network.target remote-fs.target nss-lookup.target

[Service]
Type=forking
ExecStart=/application/nginx/sbin/nginx -c /application/nginx/conf/nginx.conf
ExecReload=/application/nginx/sbin/nginx -s reload
ExecStop=/application/nginx/sbin/nginx -s stop

[Install]
WantedBy=multi-user.target

2.mysqld.service
第一种方式
[root@blog /etc/systemd/system]# cat mysqld.service
Unit
Description=MySQL Server by oldboy
Documentation=man:mysqld(8)
Documentation=http://dev.mysql.com/doc/refman/en/using-systemd.html
After=network.target
After=syslog.target
[Install]
WantedBy=multi-user.target
[Service]
User=mysql
Group=mysql
ExecStart=/application/mysql/bin/mysqld --defaults-file=/etc/my.cnf
LimitNOFILE = 5000

第二种方式
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
3.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

4.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

文件内容解释

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