CentOS7 IP Address Auto-Configuration Fix

If CentOS 7 is unable to automatically obtain an IP address, you can try the following solutions:

1. Check the network connection: make sure the Ethernet cable or Wi-Fi connection is working properly without any disconnection or faults.
2. Check the network configuration: open the terminal, type the command “ifconfig -a” to check the status of network interfaces, make sure the network interfaces are functioning properly. You can use the command “nmcli connection show” to view the configuration information of network connections.
3. Restart the network service by entering the command “systemctl restart network” to try to retrieve the IP address again.
4. Setting up network connections: You can use commands such as “nmtui” or “nmcli” to configure network connections, manually entering details such as IP address, subnet mask, and gateway.
5. Check the DHCP service: Make sure the DHCP server is running properly by using the command “systemctl status dhcpd” or “systemctl status NetworkManager” to check the status of the DHCP service.

If the above methods do not solve the problem, there may be other issues in the network configuration. It is recommended to check the system log file (such as /var/log/messages) for error messages, or contact the network administrator or service provider for further investigation and resolution.