Blog about usage of Oracle's Enterprise Linux (OEL) aka "Unbreakable Linux" in a data center. Installation, configuration, tweaks, hacks, tips and tricks... whatever and all of the above, as we deploy Linux servers as the choice for all non-Microsoft services
Using sudoers in Linux to implement security is commonly done. Often administrators or operators allow themselves to 'sudo su -' to become root, without the need to know the root password. This is more comfortable as you don't need to type "sudo" in front of every command and your sudoers file becomes less exhaustive without the need to specify every command operators and sysadmins need.
However, enforcing everyone - even sysadmins - to prepend every command with "sudo" creates an audit trail when sudo logs to a file. This often required for compliancy reasons.
Dell TechCenter posted a very easy "how to get started" guide for KVM Virtualization that you may find useful if you're just getting started and know little or nothing about virtualization (in Linux or elsewhere). It's good for the basics.