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When faced with this obstacle reboot the vm selecting the rescue kernel. 

After it boots login as normal and try the try the following dacut command.  

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At this point the VM has DHCP enabled, and therefore it will receive a dynamic IP address suitable for your environment. The easiest way to access the VM at that point is from the virtualization software terminal. So go ahead and boot the VM. After the VM is finished booting you will be welcomed by a login prompt. First, log in using the default credentials.

You now have three options to configure custom networking If it's desirable to customize the network settings we offer the following options:

• Option #1 - Manual configuration
  The VM appliance is a normal CentOS 6 7 system, hence all the mechanisms for network configuration in CentOS are available.
  Most specifically you'll be interested in the  files /etc/hosts, /etc/sysconfig/network, /etc/sysconfig/iptables and /etc/sysconfig/network-scripts/ifcfg-eth0<interface_name>.
• Option #2 - Use our example network configuration files
  

  Root's home directory contains 2 example network configurations, one for static IP's and one for DHCP.  Copy the one you require to /etc/sysconfig/network-scripts/ and edit it to suit:

  Code Block
  cp ifcfg-eth0.static /etc/sysconfig/network-scripts/ifcfg-eth0

  
  

  Now set the IP, netmask, gateway, and DNS if you like ( to add DNS you can add two lines, one for each server: DNS1=ip , DNS2=ip similar to the  example below); finally, run service network restart to activate.

  
  

  Code Block
  DEVICE="eth0" NM_CONTROLLED="yes" ONBOOT=yes TYPE=Ethernet BOOTPROTO=dhcp DEFROUTE=yes PEERDNS=yes PEERROUTES=yes IPV4_FAILURE_FATAL=yes NAME=eth0 HWADDR=08:00:27:F0:24:96 IPADDR=192.168.0.112 NETMASK=255.255.255.0 GATEWAY=192.168.0.1 DNS1=74.202.226.66 DNS2=74.202.226.65

  Option #3 - Use the menu-based tool system-network-config
  Simply type  in system-config-network and follow the prompts.
  NOTE: in Opmantek VM appliances before 8.5.12G the  tool is not preinstalled and you have to run yum install system-config-network-tui first.
  Image Removed

  
  

Set Up Firewall (optional)

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