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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.
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My friend was running firefox on linux mint, and it froze and he used xkill to kill firefox. But still it shows up in htop ps -aux. He tried to kill it multiple times but it didn't work. See the pictures for explanation. We had to kill power to shutdown, even systemd can't stop that process.
killtakes a process ID (i.e. a number) not a process name. Either find the right PID withpsfirst or usekillall, although be aware thatkillalldoes exactly what it says: kills all processes matching the string it is given. If you only want to kill one of several Firefox processes that isn't what you want.Sorry my mistake, it was
pkill, but we also triedkillwith process id, and we also triedkillall. Every method that I knew i tried.