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→Ethernet port test
<p>'''2. Enter the ip a s eth0 command in the debugging serial terminal to view the IP address.'''</p>
<p>'''3. If there is no debugging serial port or HDMI display, you can also check the IP address of the development board's network port through the router's management interface. However, with this method, people often fail to see the IP address of the development board. If you can't see it, here's how to debug it:'''</p>
:<p>'''A) First check whether the Linux system has started normally. If the green light of the development board flashes, it usually means that it has started normally. If only the red light is on, or the red and green lights are not on, it means that the system has not started normally;'''</p>:<p>'''B) Check whether the network cable is plugged in tightly, or try another network cable;'''</p>:<p>'''C) Try another router (I have encountered many problems with routers, such as the router being unable to assign an IP address normally, or the IP address being assigned normally but not being visible in the router);'''</p>:<p>'''D) If there is no router to replace, you can only connect an HDMI display or use the debugging serial port to check the IP address.'''</p>
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<li><p>The command to test network connectivity is as follows. The '''ping''' command can be interrupted by pressing the '''Ctrl+C''' shortcut key.</p>
{| class="wikitable" style="background-color:#ffffdc;width:800px;" |-| <big><p>'''Please do not copy the following commands. For example, the network node name in debian12 is end0. The following command needs to be modified to ping www.baidu.com -I end0.'''</p></big>|}{| class="wikitable" style="width:800px;" |-|
<p>orangepi@orangepi:~$ '''ping www.baidu.com -I eth0'''</p>
<p>PING www.a.shifen.com (14.215.177.38) from 192.168.1.12 eth0: 56(84) bytes of data.</p>
<p>--- www.a.shifen.com ping statistics ---</p>
<p>4 packets transmitted, 4 received, 0% packet loss, time 3002ms</p>
<p>rtt min/avg/max/mdev = 6.260/6.770/7.275/0.373 ms</p>|}</li></ol>
<span id="wifi-connection-test"></span>
