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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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Why is SYSRQ Disabled on most consumer distributions? (lemmy.ml)

submitted 9 months ago by Artemis_Mystique@lemmy.ml to c/linux@lemmy.ml

14 comments fedilink hide all child comments

I use fedora on a 11ish year old laptop(It had decent specs for its time).

recently i encountered an issue while playing a 11 hour webm video(celluloid flatpak) i had downloaded off youtube,

the screen froze, I could still hear the video sound playing, but the system wasn't responding to any keyboard presses(Wouldnt switch over to TTY2-4),

I had heard about REISUB and tried it, but it obviously didnt work, after about 2:30 mins the system unfroze and i was shuffled Across numerous TTY's and the video closed as i had invoked CLTRL+Q

I am not here for a resolution to my problem The issue is reproducible by loading numerous instances of videos whose combined watch time Exceeds about 7-8 hours

I am more curious as to why SYSRQ is disabled and are there any consequences in enabling it(Security Wise)?

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[–] Atemu@lemmy.ml 15 points 9 months ago (1 children)

Improper use of sysrq can absolutely lead to a borked system or other breakages as it allows you to initiate unclean shutdowns or kill all processes which can have consequences.

If your system is stuck though, sysrq is often your only option short of hardware shutdown.

[–] drwho@beehaw.org 4 points 9 months ago (1 children)

Especially if you're prone to accidentally hitting SysReq instead of PrintSc by accident.

[–] Artemis_Mystique@lemmy.ml 2 points 9 months ago

but on my keyboard they are the same key? Hitting ALT+PRTSC took an instant screenshot