Step-by-Step Guide to Configuring a Static Network on CentOS 7.4 VM

Overview

The author previously shared a CentOS 6.7 network configuration tutorial and, after encountering differences while configuring CentOS 7.4, compiled this guide to help readers set up a static network on a CentOS 7.4 virtual machine.

Static Network Configuration Steps

Log into the VM, navigate to /etc/sysconfig/network-scripts/ and list the files. In CentOS 7.4 the interface configuration file is ifcfg-ens160 , unlike ifcfg-eth0 in CentOS 6.7.

Edit ifcfg-ens160 with vi or vim . The original file contains many entries; you only need to modify two fields and add your network details.

Set ONBOOT to yes and BOOTPROTO to static , then add your IP address, gateway, netmask, DNS1 and DNS2.

Save and exit the editor with :wq! .

Optionally verify the file using cat /etc/sysconfig/network-scripts/ifcfg-ens160 .

Restart the network service: service network restart . A green “ok” indicates success; a red “Failed” suggests configuration errors such as an unavailable IP or unchanged ONBOOT/BOOTPROTO.

Test connectivity with ping baidu.com . Use Ctrl+C to stop the test.

Check the assigned address with ip addr . Note that ipconfig is not available on CentOS.

After completing these steps the virtual machine should be able to access the Internet successfully.