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a.Use root account to login Orange Pi(please note that do not login with the account of orangepi<br>
b.$ usermod -l zhangsan orangepi Change orangepi account into Zhangsan
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[[File:Orange-pi-pc2-img30.png|400px|]]
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c.$ groupmod -n zhangsan orangepi Change group
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[[File:Orange-pi-pc2-img31.png|400px|]]
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$ ls /dev/ (Input command in the PC terminal to check the device number of TTL to the serial cable)
<div style="padding-left:100px; ">[[File:Orange-pi-i96-img85.png|800px]]</div>
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* It can be seen from the figure that TTL to the serial port cable is identified as ttyUSB0, configure the /ect/kermit/kermitc file, update the serial port information.<br>
$ sudo vi /etc/kermit/kermitc
* Set the value of setline into /dev/ttyUSB0
<div style="padding-left:100px; ">[[File:Orange-pi-i96-img86.png|800px]]</div>
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'''4)Start debug'''
* Input command in the host computer terminal, enter the Kermit mode:
$ sudo kermit –c
<div style="padding-left:100px; ">[[File:Orange-pi-i96-img87.png|800px]]</div>
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* Power on and boot OrangePi, the serial port will print debug log automatically<br>
