<ol style="list-style-type: decimal;">

<li><p>Download '''rootcheck.apk''' from the <span class="mark">[http://www.orangepi.online/html/hardWare/computerAndMicrocontrollers/service-and-support/Orange-Pi-Zero-3.html '''official tool''']</span> on the development board data download page</p>

<p>[[File:zero3-img350.png]]</p></li>

<li><p>Then make sure that the adb connection between the Ubuntu PC and the development board is normal. For how to use adb, please refer to the instructions in the section on [[Orange Pi Zero 3#How to use ADB|'''how to use ADB''']]</p></li>