In this artticle you will learn how to manually config CentOS network (DHCP or STATIC).
PART I. Steps To Configure DHCP
Step 01: Go to /etc/sysconfig/network-scripts
Command: cd /etc/sysconfig/network-scripts
Step 02: Type ls and find your network interface name. In this case it is called ifcfg-enp0s3
Step 03: Edit the file
Command: sudo vi ifcfg-enp0s3
Step 04: Make sure thst BOOTPROTO = dhcp and ONBOOT is set to YES
Step 05: Add MM_CONTROLED=no (This line ensures that Network Control Manager will not make any changes to this configuration)
Step 06: Hit Esc key and type :wq to write the file to disk and quit the editor.
Step 07: Restart the network interface.
Command: systemctl restart network
Step 08: You can type ip a to see if there is an IP adress assigned
That’s it for DHCP configuration.
PART II. Steps To Configure Static IP Address
Step 01: Go to /etc/sysconfig/network-scripts
Command: cd /etc/sysconfig/network-scripts
Step 02: Type ls and find your network interface name. In this case it is called ifcfg-enp0s3
Step 03: Edit the file
Command: vi ifcfg-enp0s3
Step 04: Make sure that BOOTPROTO this time is set to static and add the following lines:
IPADDR = (YOUR IP ADDRESS)
NETMASK= (YOUR SUBNET MASK)
GATEWAY= (YOUR GATEWAY IP)
DNS1= (YOUR DNS)
DNS2=(YOUR SECOND DNS)
Step 04: Hit Esc key and type :wq to write the file to disk and quit the editor.
Step 05: Restart the network interface.
Command: systemctl restart network
Step 08: You can type ip a to verify that the desired IP adress is assigned.
That’s it!
