Sunday, May 12, 2013

GRsec patched kernel install

Fetch the sources:

Download kernel from


Downlaod latest Grsecurity patch from below URL :


tar xjf linux-

Patch the kernel:

#cd linux-

#patch -p1 < ../grsecurity-2.2.2-

Now start making the kernel :

# make clean && make mrproper

Edit your kernel as per your need :

# make menuconfig

Compile your kernel and install it:

# make bzImage

# make modules

# make modules_install

Make sure it’s working ok with the help of following command :

# depmod

Installing and booting the new kernel :

# cp arch/i386/boot/bzImage /boot/vmlinuz-

There is also a file called “” that must be copied to the same boot directory.

# cp /boot

Do not forget to make changes in /etc/grub.conf

also go to grub prompt after this and fire below command :

# grub > savedefault –-default=0 –-once

Now reboot server :

#Shutdown -r now.

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