Forzare reboot o halt

Reboot :
echo 1 > /proc/sys/kernel/sysrq
echo b > /proc/sysrq-trigger

Per l’halt:
echo 1 > /proc/sys/kernel/sysrq
echo o > /proc/sysrq-trigger

Per riavviare in sicurezza:

Alt+Sysrq+R   
Alt+Sysrq+E   
Alt+Sysrq+I   
Alt+Sysrq+S   
Alt+Sysrq+U   
Alt+Sysrq+B   

Ricordati: REISUB