RT Linux is a specific distribution of Linux, as is Fedora. You can install RT Linux over Fedora, but RT Linux isn't a program you install in a Fedora installation, but an entirely different installation altogether (and meant for different things; RT Linux is meant for specialty devices where the machine needs to manage devices and calculations in Real-time whereas Fedora is more a desktop/server distribution.)
No. Hybrid implies that there is a mix with something else. Fedora uses only the Linux kernel.
Linux Pluggable Authentication Modules (PAM) provide dynamic authorization for applications and services in a Linux system. Linux PAM is evolved from the Unix Pluggable Authentication Modules architecture.
Fedora Core and later Fedora !
Fedora and openSUSE are the open-community spin-offs of privately managed and developed for-profit GNU/Linux distributions, Red Hat Enterprise Linux and SUSE Enterprise Edition Linux.
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GNU/Linux? Plenty. Debian, Ubuntu, Arch Linux, Gentoo, Slackware, Fedora, and many more. Non-GNU Linux? Android.
Anaconda is an installer used by Red Hat and Fedora.
Red Hat Linux was discontinued in 2004 in favour of Red Hat Enterprise Linux for enterprise environments. However, Red Hat Linux still exists as "Fedora", free for home use, developed by "Fedora Projects", though the entire line is no longer commercial and only supported by the Linux community.
Fedora is a desktop-oriented Linux distribution, and ususally features Red Hat's more experimental software.
Linux is an operating system kernel. By itself, it can do very little. It needs to be combined with an interface and applications in order to be useful. When you take the kernel and add the parts to create a working system, you create what is called a "Linux distrbution", or "distro." Fedora is an example of a Linux distro. In summary, Linux is a kernel, and Fedora is a full operating system.