This takes one argument, which is a single letter. It calls the
generic kernel's SysRq driver, which does whatever is called for by
- that argument. See the SysRq documentation in Documentation/sysrq.txt
- in your favorite kernel tree to see what letters are valid and what
- they do.
+ that argument. See the SysRq documentation in
+ Documentation/admin-guide/sysrq.rst in your favorite kernel tree to
+ see what letters are valid and what they do.