Am 25.02.2015 um 15:35 schrieb Ali AlipourR:
>> Why sysrq is limited to only "sync" command on
official fedora kernel?
>
> The kernel itself isn't limited. It's just set that way in
> /usr/lib/sysctl.d/50-default.conf which is provided by systemd. You
> can edit that file, create your own in /etc/sysctrl.d/, or (as root)
> set it to whatever you would like via /proc/sys/kernel/sysrq.
Of course it can be changed at runtime, but I mean why official fedora
kernel shouldn't be configured to allow all (or at least a wider
subset) of sysrq commands by default?
This way official fedora live CDs are unsuitable for system recovery
tasks; you have to change sysrq value every time you use live CDs or
build your own live CD
it is nothing someone is using regulary and that settings are security
settings recommended by most auditing tools