Solve the problem that the network card configuration file cannot be found after adding a new network card in CentOS

After using the VMware Workstation virtual machine to install the CentOS7 virtual machine, there is a problem that CentOS 7 has no network card configuration file after adding a network card. After adding a second network card, after entering the CentOS 7 system, the network card configuration file cannot be seen.

After entering the CentOS7 system, use ip addr to check the status as follows:

I found that both ens33 and ens77 have IP addresses and can be used normally. ens33 uses a manually configured IP, and ens37 uses an IP address automatically obtained by dhcp, but ifcfg cannot be found in the /etc/sysconfig/network-scripts/ directory. -ens37 configuration file

Solution:

1. Use the nmcli con show command to view the UUID information of the network card and note down the UUID value

2. Use the ip addr command to view the network card information and note the MAC address of the ens37 network card

3. Copy the ifcfg-ens33 file in the /etc/sysconfig/network-scripts/ directory and name it ifcfg-ens37. Modify the configuration file again and pay attention to modifying the necessary hardware information.

4. Finally, restart the network card.

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