Network init.

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Step 1 » Type this command “nmtui” to open Network manager and press enter after choosing ” Edit a connection” ( Use TAB for choosing options ) .
Setup network on centos 7
Step 2 » Now you can see all network interfaces, choose one and click “Edit“.
Setup network on centos 7

» DHCP configuration

Step 3 » For DHCP,
1. Choose “Automatic” in IPv4 CONFIGURATION.
2. Choose Automatic Connect check box.
3. Press OK and quit Network manager.
Setup network on centos 7
Now Restart network service by typing below command.
systemctl restart network Now your server will get IP Address from DHCP .

» Static configuration

Step 4 » For manual IP address,
1. Choose “Manual” in IPv4 CONFIGURATION.
2. Add IP Address with Subnet , Gateway and DNS server ( Refer below image ).
3. Choose Automatic Connect check box.
4. Press OK and quit Network manager.
Setup network on centos 7
Now Restart network service by typing below command.
systemctl restart network That’s it, Interface will have static IP.