this post was submitted on 27 Mar 2026
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Linux
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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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I'm not sure that I would recommend a newer user use sysrq. It is a very powerful tool that you definitely should not be blindly following from a random internet post without knowing what each command does.
In a truly frozen system then it can be good, but only as a final last resort. If the system can be unfrozen by other methods then that should be preferred instead.
Totally switch to a terminal first like you suggested and see if you can work your way from there. My suggestion goes after yours. Always try to fix the running system first.
It's probably wise to check man pages and other introductory documentation for most system administration tasks. Even though they're super low-level, they are in my opinion better to send than just pulling the power plug.