man linux - справочник linux

Если при запуске hpacucli или иного софта

Feb 7 17:42:06 server kernel: grsec: From xx.xx.xx.xx: denied use of iopl() by /opt/compaq/hpacucli/bld/.hpacucli[.hpacucli:6764] uid/euid:0/0 gid/egid:0/0, parent /usr/sbin/hpacucli[hpacucli:6757] uid/euid:0/0 gid/egid:0/0

Решение:

Or you can appending this to
/etc/sysctl.conf

kernel.grsecurity.disable_priv_io = 0

And reboot your system.