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'''===Install'''===
'''===Test safe shutdown'''===
''' === PWM fan control''' （This is optional）===
'''uninstall'''===Uninstall===
* [https://retropie.org.uk/download/ retropie-buster-4.8-rpi4_400.img.gz]
* [https://twisteros.com/download.html TwisterOSv2-1-2.img.xz]
<pre>
cd ~
xoff
* Please run 'xoff' to shut down or press the on-board button switch to shut down. <span style="color:red;">DON'T run the 'shutdown' linux command to shut down, otherwise the power of device will not be shut down.</span>
* press `7-8` seconds to force shutdown.
===How to enable OLED display===
Please refer to [[How to enable OLED display]]
PS: You can ignore this step if you don't use the 3-Pin PWM fan to cool the CM4. In fact, the [[C235]] passive cooler can provide enough cooling capacity, and you can also avoid the trouble of fan noise, it is included in [[NASPi CM4-M2]] and [[NASPi CM4-2.5]]
sudo ./uninstall.sh
sudo reboot now