Tuning Linux systems for performance is an essential task for any system administrator, but it also is one of the least documented. Without a hard-won understanding, performance tuning often can seem ...

If you don't need'em, skip installing'em.

Even though its title gives the impression, the goal of this four-hundred-page book is not to explain how to build a GNU/Linux distribution from scratch. For example, there are no step-by-step ...

Does each Machine get 4gb ram? If so, that's a problem. Also, you have to remember to reserve some ram for the host OS. I'd give each (assuming 3 VMs that don't need massive ram requirements) 1.5GB ...