Requirements
- Virtual Box
- Centos 6.3 or 6.4 (I used 6.4 )
Step 1 : Configure Virtual Box Network Settings
There are different modes or ways you can configure Virtual box network settings.- Not Attached
- NAT
- Bridged Adapter
- Internal Network
- Host-Only Adapter
- Generic Driver You can find more details about the different modes here.
Open Virtual Box and right click on your CentOS VM, and click on “Settings“.
Step 2: Configure CentOS network settings
Method 1: Dynamic IPWe can configure the network by using Dynamic IP address which are assigned automatically by the DHCP server. This is the simplest way to configure your network.
NOTE: You will have a line that starts with HWADDR in the your config file, do not change or modify that line. In your terminal, type the following:
vi /etc/sysconfig/network-scripts/ifcfg-eth0Now, add/modify the file as follows (DO NOT CHANGE the HWADDR line your config file):
DEVICE=eth0 HWADDR=08:00:27:36:3F:37 TYPE=Ethernet UUID=1e4ee4d1-e438-4db2-9cb5-45e7a488be88 ONBOOT=yes NM_CONTROLLED=yes BOOTPROTO=dhcpNow, save the file by pressing “ESC” and typing :wq and hit ENTER.
To view your network config file. type the following in the terminal:
[root@localhost ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0 DEVICE=eth0 HWADDR=08:00:27:36:3F:37 TYPE=Ethernet UUID=1e4ee4d1-e438-4db2-9cb5-45e7a488be88 ONBOOT=yes NM_CONTROLLED=yes BOOTPROTO=dhcpNow, you will have to restart your network. You can do so by typing the following in the terminal:
service network restartYour result must be
[root@localhost ~]# service network restart
Shutting down interface eth0: [ OK ]
Shutting down loopback interface: [ OK ]
Bringing up loopback interface: [ OK ]
Bringing up interface eth0:
Determining IP information for eth0... done.
[ OK ]
To view your IP address, type the following in your terminal:
ifconfig eth0You can see your IP Address of the interface eth0 next to the field “inet addr:” as shown below:
ping google.com
So, Hurray! you have successfully setup up your network in your CentOS Virtual Box.
Method 2: Static IP
We can also assign the network information manually by assigning the IP Address, NETMASK , GATEWAY in the network interface config file.
NOTE: You will have a line that starts with HWADDR in your config file, do not change or modify that line.
Step 1:
In you terminal, type:
vi /etc/sysconfig/network-scripts/ifcfg-eth0Now, edit/merge the file to the following
DEVICE=eth0 HWADDR=08:00:27:EB:C1:68 TYPE=Ethernet UUID=38341514-767c-4546-9154-859a7b495642 ONBOOT=yes NM_CONTROLLED=no BOOTPROTO=static IPADDR=172.16.2.105 GATEWAY=172.16.0.1Now, press ESC and type :wq and hit ENTER to save and exit the configuration file.
cat /etc/sysconfig/network-scripts/ifcfg-eth0
Step 2: Change Host name:
To change host name , you have to edit the config file /etc/sysconfig/network.
vi /etc/sysconfig/networkNow, you will see a file such as the one shown below:
To change the hostname , you can change the highlighted to any thing you want. Press ‘i‘ or INSERT to edit the file. After making necessary changes, you can save the file by pressing ESC followed by :wq and hit ENTER.
Now, restart to make necessary changes. You can reboot by typing the following in the command line:
rebootAfter reboot, login and check your hostname by typing the following in the terminal / command line :
hostnameStep 3: Assign DNS Server IP
To manually assign primary and secondary DNS Server IP addresses, in your terminal type:
vi /etc/resolv.confNow, edit this file to the following:
; generated by /sbin/dhclient-script nameserver 8.8.8.8 nameserver 8.8.4.4Now, press ESC and type :wq and hit ENTER to save and exit the configuration file.
Now, if you want you can make sure you have entered and saved the correct configuration(It is a good practice to double check :D ). To view your dns config file, in your terminal type:
cat /etc/resolv.conf
Step 4: Restart network:
Finally, all you have to do is to restart your network service. To so so, type the following in the terminal:
service network restart
[root@centosAshley02 ~]# service network restart Shutting down interface eth0: [ OK ] Shutting down loopback interface: [ OK ] Bringing up loopback interface: [ OK ] Bringing up interface eth0: [ OK ]Now, you can check your Current IP configuration, by typing the following in the terminal:
ping imbaprogramming.blogspot.com
You can press CTRL+ C to stop the ping command.
So, Hurray! you have successfully setup up your network manually in your CentOS Virtual Box.
