systemctl 添加新服务示例

mysql 服务添加

1. 创建启动文件 .service
   vim /usr/lib/systemd/system/mysqld.service

[Unit]
Description=MySQL Server
After=network.target
After=syslog.target
[Service]
User=mysql
Group=mysql
Type=forking
PermissionsStartOnly=true
ExecStart= /etc/init.d/mysqld start
ExecStop= /etc/init.d/mysqld stop
ExecReload= /etc/init.d/mysqld restart
LimitNOFILE = 5000
[Install]
WantedBy=multi-user.target

2. 重新加载一下服务的配置文件
   systemctl daemon-reload
3. 开启mysql服务
   systemctl start mysqld.service
4. 关闭mysql服务
   systemctl stop mysqld.service

设置开机启动

1. 设置开机自启项
   systemctl enable redis
2. 查看开机自启项
   systemctl list-unit-files
   左边是服务名称，右边是状态，enabled是开机启动，disabled是开机不启动