2013-12-30

kernel installation in CentOS using rpm


Pranaam to all bhai ji _/\_
Today we will learn , installing kernel in CentOS

kernel is the core part of an operating system without which we cant imagine operating system.
it is just like , engine in vehicle.
we bind third party utility and other tools to engine and in result we get a vehicle , same case with kernel.
we need to bind third party software and utility with it and in final we get a user friendly operating system ^_^.
lets start ..........
before proceeding to kernel installation, dont forget to check your machine architecture (32 bit or 64 bit)
run command  uname -i for checking your machine architecture


 
i383, x86 is for 32 bit hardware
x86_64  is for 64 bit hardware
so after this , grab your present kernel release by using command
uname -r
once you have got your system architecture and kernel release , download new kernel for your system from link given below
http://mirror.centos.org/centos/

we need to download kernel rpm file and firmware rpm file for that release(you will get firmware rpm file for kernel with same name having firmware in it like  kernel-firmware-y.yy.yy.rpm)
mine one is 2.6.32 october 2013 release
and i am installing 2.6.32 december 2013 release
so i am downloading kernel rpm file using wget command


download kernel firmware too :)


ok , we have downloaded kernel firmware as well kernel rpm files .
before installing kernel , remember one thing
during installation process
we update kernel-firmware instead of installation whereas we should install kernel instead of upgrade
it is because if you are going to use update kernel , it means we are replacing old installed kernel with new kernel and this may lead to kernel panic error :P
so its batter option to go for installation of new kernel and we will have 2 kernel in our system.
if new kernel is compatible with our hardware, then we can remove old kernel ;)
 so lets start :)

first of all we will update kernel firmware by using command
rpm -Uv  kernel-firmware-version.rpm



now install kernel , run command
rpm -iv kernel_file.rpm



during installation of kernel , you may face error like this one


you can resolve this error by running this command
yum update bfa-firmware



after resolving this , try to install kernel again and you will be able to install it ;)


after finishing installation , you can confirm installation of new kernel by running command
rpm -q kernel
this command will list all installed kernels on your system


now reboot your system and in boot menu you will see 2 kernels , select one to continue system booting
your system will boot with kernel that you will select from boot menu


i am selecting first kernel for booting
and now my system is using new kernel


done...............
it was about installing new kernel in your CentOS system
Thank you

Greetz to :- Guru ji Zero , code breaker ica, Aasim shaikh,Reborn, Raman kumar rana,INX_r0ot,Darkwolf indishell, Chinmay Pandya ,Silent poison India,Magnum sniper,Atul Dwivedi,ethicalnoob Indishell,Local root indishell,Irfninja indishell,Hardeep bhai,Mannu,Viki and AR AR bhai ji <3
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