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Back to linux!
(lemmy.one)
From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
Community icon by Alpár-Etele Méder, licensed under CC BY 3.0
You can right-click on a process and select Send Signal → Kill. It will then ask for elevated privileges, if you're trying to kill a process not directly started by you.
If you mean that some program really hangs your whole session, well, the last-ditch option is to switch to a TTY and kill it from there. But yeah, that one isn't equipped with a nice GUI...