Ubuntu-18-开机自启

ubuntu18.04 不再使用initd管理系统，改用systemd

1. 设置启动参数
   vim /lib/systemd/system/rc.local.service

   [Unit]
   Description=/etc/rc.local Compatibility
   Documentation=man:systemd-rc-local-generator(8)
   ConditionFileIsExecutable=/etc/rc.local
   After=network.target
   
   [Service]
   Type=forking
   ExecStart=/etc/rc.local start
   TimeoutSec=0
   RemainAfterExit=yes
   GuessMainPID=no
   
   #这一段原文件没有，需要自己添加
   [Install]
   WantedBy=multi-user.target
   Alias=rc-local.service

2. 添加软链接

   ln -s /lib/systemd/system/rc.local.service /etc/systemd/system/rc.local.service

3. 创建服务

   touch /etc/rc.local

4. 赋可执行权限

   chmod 755 /etc/rc.local

5. 编辑自启动服务
   vim /etc/rc.local

   #开机打印hello
   echo "hello" > /etc/test.log
   # 开机启动zookeeper
   /usr/local/zookeeper/bin start