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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 
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    [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
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    ln -s /lib/systemd/system/rc.local.service /etc/systemd/system/rc.local.service
  3. 创建服务
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    touch /etc/rc.local
  4. 赋可执行权限
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    chmod 755 /etc/rc.local
  5. 编辑自启动服务
    vim /etc/rc.local
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    #开机打印hello
    echo "hello" > /etc/test.log
    # 开机启动zookeeper
    /usr/local/zookeeper/bin start