With that i mean using your operating systems tool for installing software. (apt, dnf, pacman, …)
This only works after successfully installation with the operating system installation software.
There are 4 officially supported Linux distros: Debian, Ubuntu, Fedora and Arch. There are distros who are supported by the community but of course tested to a lesser degree and in most cases you depend on a single volunteer.
Generally: Library management in KiCad version 5