The Linux virtual machine cannot be pinged to the external system or cannot be connected to the Internet.
Many people use linux virtual machines to ping external systems or fail to access the network when designing a linux course. This is mainly related to the default settings of the system, let me help you solve this problem.
1. First open the "Edit> Virtual Network Editor" of the VM"
Just set it to the same as I did. The best thing is to first remove the three networks and then add them one by one. After adding the three networks, set it to the same according to my configuration, click application, and then click OK. Step 2: open a terminal in Linux and run the setup command to open the firewall.
Step 3: Use the service network restart command on the terminal to restart the network service. If the network service is successfully restarted, use ifconfig to view your ip address and identify your physical network card eth0, and the ip address is different from the original ip address. Congratulations!