There are some other benefits to using an OS within a VM, like having a virtual drive that grows and shrinks based on what you need. If I need a bit more oomph, I can reconfigure my VM with more RAM ...

Certifications from Red Hat, Oracle and SUSE are tailored to environments where those Linux distributions are prevalent.

Learn how to use Linux help commands like apropos, whatis, man, info, and --help to discover commands and learn their usage.