mikeybikes wrote: » For the Linux+, unless they've revised the materials in the last year, study from CentOS 6 and Debian. CentOS 7 (and other EL 7 variants) are using Systemd/Journald and have other changes that are significantly different from the older systems that Linux+ still tests knowledge of. You'll need practice with RPM/YUM and DEB/APT package installation systems, so it is best to work off of both. If you have a computer with enough resources, install a desktop visualization platform like VirtualBox and run a VM of CentOS 6 and one of Debian.