注意：

• RouterOS的更新过程并不靠谱，请自行斟酌；我只建议在long-term通道上使用自动更新
• 请预先设定好更新通道，脚本不会修改这一设置

/system script
add dont-require-permissions=no name=os-upgrade owner=admin policy=ftp,reboot,read,write,policy,test,password,sniff,sensitive,romon source=\
    "/system package update\r\
    \ncheck-for-updates once\r\
    \n:delay 1s;\r\
    \n:if ( [get status] = \"New version is available\") do={ install }"
/system scheduler
add interval=1d name=auto-upgrade on-event="/system script run update" policy=ftp,reboot,read,write,policy,test,password,sniff,sensitive,romon start-date=jan/1/2019 start-time=04:00:00