ubuntu-18.04 设置开机启动脚本

lsb_release -a    查看版本

16.00以上的版本都不能走原来的开机启动流程了

1. 建立rc-local.service文件
   sudo vi /etc/systemd/system/rc-local.service
2. 将下列内容复制进rc-local.service文件
   [Unit]
   Description=/etc/rc.local Compatibility
   ConditionPathExists=/etc/rc.local
    
   [Service]
   Type=forking
   ExecStart=/etc/rc.local start
   TimeoutSec=0
   StandardOutput=tty
   RemainAfterExit=yes
   SysVStartPriority=99
    
   [Install]
   WantedBy=multi-user.target
    
3. 创建文件rc.local
   sudo vi /etc/rc.local
4. 将下列内容复制进rc.local文件
   #!/bin/sh -e
   #
   # rc.local
   #
   # This script is executed at the end of each multiuser runlevel.
   # Make sure that the script will "exit 0" on success or any other
   # value on error.
   #
   # In order to enable or disable this script just change the execution
   # bits.
   #
   # By default this script does nothing.
   echo "看到这行字，说明添加自启动脚本成功。" > /usr/local/test.log
   exit 0
5. 给rc.local加上权限,启用服务
   sudo chmod +x /etc/rc.local
   sudo systemctl enable rc-local
6. 启动服务并检查状态
   sudo systemctl start rc-local.service
   sudo systemctl status rc-local.service
7. 重启并检查test.log文件
   cat /usr/local/test.log