there are lots of chaos on the screen,how can i disable them

[dirls028]

such as:
grsec: From ***.***.***.***: (default:D:/) denied send of signal 0 to protected task /usr/sbin/sshd[sshd:28753] uid/euid:0/0 gid/egid:0/0, parent /usr/sbin/sshd[sshd:2384] uid/euid:0/0 gid/egid:0/0 by /usr/bin/last[last:28986] uid/euid:0/0 gid/egid:0/0, parent /bin/bash[bash:28855] uid/euid:0/0 gid/egid:0/0
grsec: From ***.***.***.***: (default:D:/) denied open of /root/.bash_history for appending by /bin/bash[bash:28855] uid/euid:0/0 gid/egid:0/0, parent /bin/su[su:28854] uid/euid:500/0 gid/egid:500/500
i know what this mean,and i need not change the grsecurity policy,but i want this messages write in the log file instead on the screen,how can i do?
thanks

[Hue-Bond]

> i want this messages write in the log file instead on the screen

man dmesg:

-nlevel
Set the level at which logging of messages is done to the console.