CentOS kernel Upgrade tutorial

CentOS kernel Upgrade tutorial

Centos kernel upgrade, Update Procedure record

Linux kernel homepage: www.kernel.org

Download:

wget http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.39.4.tar.bz2

1. view the current system version:

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[root@xyly ~]# uname -aLinux xyly 2.6.18-164.el5 #1 SMP Thu Sep 3 03:28:30 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux

The current system kernel version is 2.6.18-164. el5, And the downloaded kernel version is 2.6.39.4.

2. kernel compilation steps.

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[Root @ xyly ~] # Cd/usr/src [root @ xyly ~] # Tar jxvf Co., linux-2.6.39.4.tar.bz2. [root @ xyly ~] # Cd linux-2.6.39.4 [root @ xyly linux-2.6.39.4] # make mrproper # Remove kernel dependencies and compiled junk Information <span id = "more-908"> </span> [root @ xyly linux-2.6.39.4] # make menuconfig or make xconfig or make gconfigmake menuconfig in menu mode enter Kernel configuration interface make xconfig is in Gui mode enter Kernel configuration interface make gconfig in Gui mode enter Kernel configuration interface

I chose the menu mode.

Check the required file system and the corresponding hardware parameters. If you are familiar with it, you can adjust the kernel parameters.

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[Root @ xyly linux-2.6.39.4] # make # compile the kernel [root @ xyly linux-2.6.39.4] # make modules # compile the kernel module [root @ xyly linux-2.6.39.4] # make modules_install # Install the kernel module

After the installation is successful, the/lib/modules directory will have a subdirectory 2.6.39.4, which contains all modules that can be loaded by the new kernel.

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[Root @ xyly linux-2.6.39.4] # makeinstall # compile and install sh/root/linux-2.6.39.4/arch/x86/boot/install. sh 2.6.39.4 arch/x86/boot/bzImage \ System. map "/boot"

Kernel installed

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[root@xyly boot]# ll initrd-2.6.39.4.img-rw------- 1 root root 2722020 Aug 29 14:43 initrd-2.6.39.4.img[root@xyly boot]# pwd/boot

3. Set the startup sequence and add the compiled kernel to grub.

(Kernel startup has been added, saving your hands)

Modify the default startup sequence in/etc/grub. conf as follows:
Default = 0
Restart the system and check whether the kernel has been upgraded.

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[root@xyly ~]# uname -r2.6.39.4

OK !!! Upgrade complete!