How to Change IP Address in CentOS 7
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Summary: Learn how to change the IP address on CentOS 7 using both command line and graphical methods. Whether you’re setting a static IP or using DHCP, follow these steps to configure networking settings on CentOS 7.
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Changing the IP address on CentOS 7 can be necessary for various reasons, such as network reconfiguration or troubleshooting. This guide covers both the command-line and graphical methods to modify your network settings.
Method 1: Command Line (Using nmcli)
Check Current Configuration:
Before making changes, identify your network interface name. You can use the ip addr or ifconfig command:
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Modify IP Address:
Use nmcli (NetworkManager command-line tool) to change the IP address. Replace eth0 with your network interface name and 192.168.1.100 with your desired IP address:
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Set Gateway and DNS:
Update the default gateway and DNS servers:
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Apply Changes:
Reload the network configuration:
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Method 2: Graphical Interface (Using Network Manager)
Open Network Settings:
Launch the GNOME Control Center:
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Edit Network Configuration:
Select the network interface (e.g., Ethernet) and click the settings (gear) icon.
Configure IP Address:
Switch to the IPv4 tab, choose manual (for static IP) or automatic (for DHCP), and enter your desired IP address and subnet mask.
Set Gateway and DNS:
Specify the default gateway and DNS servers.
Apply Changes:
Click “Apply” to save the new settings.
Checking Changes
After applying the new settings, verify the changes using the following commands:
Check IP Address:
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Verify Connectivity:
Test network connectivity to ensure the changes are successful:
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These methods provide flexibility in managing network configurations on CentOS 7, whether through the command line for remote or script-based changes or via the graphical interface for easier visual adjustments.
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