How to view network card configuration files in CentOS 7?

To view the network card configuration file of CentOS 7, follow these steps: 1. Open the terminal and log in as the root user. 2. Use any text editor (such as vi, nano, etc.) to open the network card configuration file. On CentOS 7, the network card configuration file is located in the `/etc/sysconfig/network-scripts/` directory, with the file name usually starting with `ifcfg-`, followed by the network card name. For example, if you want to view the configuration file of the eth0 network card, you can run the following command to open the file:

  vi /etc/sysconfig/network-scripts/ifcfg-eth0

If you are unsure of the name of the network adapter, you can use the following command to list the configuration files of all network adapters:

  ls /etc/sysconfig/network-scripts/ifcfg-*

In the opened configuration file, you will see various configuration options for the network card, such as IP address, subnet mask, gateway, DNS server, etc. You can modify or view related configuration information as needed. After editing, save the file and exit the text editor. Following these steps, you can easily view and edit the network card configuration file in CentOS 7.