Magic SysRq key: Difference between revisions

Revision as of 20:24, 8 August 2019

Revision as of 14:23, 8 September 2019

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The combinations always assume the [[QWERTY]] keyboard layout; for example, on a [[Dvorak Simplified Keyboard]], the combination to shut the system down uses the {{key|R}} key instead of {{key|O}}. Furthermore, some keyboards may not provide a separate {{key|SysRq}} key. In this case, a separate {{key|[[PrintScrn|PrtScr]]}} key should be present.

On some devices, notably laptops, the {{key|[[Fn key|Fn]]}} key may need to be pressed to use the magic {{key|SysRq}} key, , e.g. Thinkpad Carbon X1 the {{key|SysRq}} is activated by pressing {{key|[[Alt key| Alt]]|[[Fn]]|[[S]]}} simultaneously, then releasing {{key|Fn}} and {{key|S}} while still holding {{key|Alt}} ([https://superuser.com/a/1237766 see here]).

The magic SysRq key may also be accessible from the serial console (by sending an [[Universal asynchronous receiver/transmitter#Break condition|RS-232 break signal]]) if the [[sysctl]] option is set to allow it.<ref>{{cite web | url = http://www.tldp.org/HOWTO/Remote-Serial-Console-HOWTO/security-sysrq.html | title = Magic SysRq key | work = Remote Serial Console How-To | first1 = Glen | last1 = Turner | first2 = Mark F | last2 = Komarinski | publisher = The Linux Documentation Project | date = 2003-03-31 | accessdate = 2015-05-08}} </ref>