Installed minimal CentOS 6.4 in VirtualBox but have no internet?

Looks like your eth0 is not set up. Here is what I did to fix mine on CentOS 6.4.

sudo su -
 
cat /etc/sysconfig/network |grep -i network

This should return: NETWORKING=yes - If it does not, then change it to yes.

vi /etc/sysconfig/network-scripts/ifcfg-eth0

This should look like:

DEVICE="eth0"
HWADDR="08:00:27:07:9e:57"
NM_CONTROLLED="YES"
ONBOOT="NO"

There are a few options that we want to change here, NM_CONTROLLED needs to be NO, ONBOOT needs to be YES, and finally add this code at the bottom:

BOOTPROTO="dhcp"

This will allow you to grab an IP from your DHCP and essentially enable IPV4.

Now the whole file should look like this:

DEVICE="eth0"
HWADDR="08:00:27:07:9e:57"
NM_CONTROLLED="NO"
ONBOOT="YES"
BOOTPROTO="dhcp"

Save and close. Now, lets restart the network service to reload with these settings:

[root@Development ~]# 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  ]

Notice the ‘eth0′ – awesome! Now lets check to see if we got an IPV4 from our DHCP:

ifconfig

You should now see 'eth0'.

You have no networking configured. you should have enabled it during install (its not obvious, I missed it too during my first minimal-install). Try:

dhclient eth0 # gets you DHCP on en0

This will get you started. Then try:

yum install system-config-network-tui

Which will give you a curses based network config program where you can set things permanently.

I had a similar problem, but all I needed to do was edit the network-script to yes for onboot and restart the network.

Edit the network-script

 vi /etc/sysconfig/network-scripts/ifcfg-enp0s3
 
 bla bla=bla
 ...
 onboot=yes

Restart network

 systemctl restart network

When you're installing CentOS, on the networking page, there is a button at the bottom left that allows you to configure the network settings. Click edit next to eth0 and find the checkbox to set the network to connect automatically.