A free and open source POSIX compatible operating system with a monolithic kernel and a kernel module system. Originally created by Linus Torvalds.

Linux or GNU/Linux is a free and open source operating system. The operating system comprises of the Linux kernel, created and first released by Linus Torvalds, and a set of applications from the GNU project, hence the name GNU/Linux.

This tag should be used when the problem involves Linux kernel specific attributes. If the problem is a general problem and happens to be environment (kernel) agnostic, then this tag should not be used.