Create a Linux Base Image

{excerpt}This page describes how to create a Linux base image.{excerpt}

Requirements¶

• Computer being captured has been added to the VCL database
• Computer has been installed with Linux
• Two network adapters are enabled on the computer: eth0 - connected to the private network eth1 - connected to the public network
• The ability to log in as root via SSH using an identity key on the private network from management node

Configure SSH Identity Key Authentication¶

1. On the Linux computer being captured, create a /root/.ssh directory: {tip}mkdir /root/.ssh{tip}
2. On the management node, copy the public SSH identity key to the authorized_keys file on the Linux computer being captured: {tip}scp /etc/vcl/vcl.key.pub :/root/.ssh/authorized_keys{tip}
3. Or replace the above two steps with the following on the management node: {tip}ssh-copy-id -i /etc/vcl/vcl.key {tip}
4. Make sure you can login from the management node to the Linux computer being captured using the identity key: {tip}ssh -i /etc/vcl/vcl.key {tip}

Configure the ifcfg-* Files¶

1. Navigate to the network-scripts directory: {tip}cd /etc/sysconfig/network-scripts{tip}
2. Delete any ifcfg-.bak files: {tip}rm -f /etc/sysconfig/network-scripts/ifcfg-.bak{tip}

3. Edit every ifcfg-eth* file in the network-scripts directory. Remove the HWADDRESS= line: {tip}vi ifcfg-eth0{tip} {tip}vi ifcfg-eth1{tip} The ifcfg-eth0 file should contain the following:

   DEVICE=eth0 BOOTPROTO=dhcp ONBOOT=yes

The ifcfg-eth1 file should contain the following:

DEVICE=eth1
BOOTPROTO=dhcp
ONBOOT=yes

1. Reboot the computer: {tip}shutdown -r now{tip}
2. Check the ifcfg-eth* files to make sure there are no ifcfg-eth* files and that the HWADDRESS= lines have not been automatically added back: {tip} ls /etc/sysconfig/network-scripts {tip} {tip} cat /etc/sysconfig/network-scripts/ifcfg-eth0 {tip} {tip} cat /etc/sysconfig/network-scripts/ifcfg-eth1

{include:Capture A Base Image}