Linux Kernel upgrade steps and Solutions

Linux Kernel is the core of the system, so upgrading the kernel is a basic skill of the Linux system administrator. So I shared an article on system O & M practices, of course, I have added some content to the source file, that is, I have added the problem and solution, and hope to help the Linux system administrators!

1. Download the kernel

Cd/usr/src

Wget http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.38.tar.gz

Tar zxvf linux-2.6.38.tar.gz

Cd linux-2.6.38

2. Download the standard configuration file of the hotspot Kernel

Wget http://vbets.googlecode.com/files/config

Mv config. config

3. Compile the kernel

Make menuconfig

Select Load an Alternate Configuration File, and then select the. config File you just downloaded.

In addition, select:

 

1) Use make menuconfig to select the following options

General setup->

[*] Enable deprecated sysfs features to support old userspace tools

2) modify the. config file

Modify CONFIG_SYSFS_DEPRECATED_V2 in the. config file and comment out

Change CONFIG_SYSFS_DEPRECATED_V2 to CONFIG_SYSFS_DEPRECATED_V2 = y

Note: If the earlier version of mkinitrd and its nash does not have the CONFIG_SYSFS_DEPRECATED_V2 parameter in the kernel, the earlier version of sysfs path format is used by default, so that the hard disk information node in the/sys cannot be correctly accessed in the new kernel.

It mainly solves the "mount: cocould not find filesystem '/dev/root'" error.

Make bzImage

Make modules

Make modules_install

Make install

4. decompress and modify the kernel

Cp, boot, initrd-2.6.38.img, tmp

Cd/tmp/

Mkdir newinitrd

Cd newinitrd/

Zcat./initrd-2.6.38.img | cpio-I

Rm-rf/tmp/initrd-2.6.38.img

Vi init

If the two rows are the same, remove one row.

Echo "Loading dm-region-hash.ko module"

Insmod/lib/dm-region-hash.ko

Echo "Loading dm-region-hash.ko module"

Insmod/lib/dm-region-hash.ko

This mainly resolves errors like "insmod: error inserting '/lib/dm-region-hash.ko':-1 File exists"

5. Re-package the kernel

Find. | cpio-c-o> ../initrd

Cd ../

Gzip-9 <initrd> initrd-2.6.38img

Rm-rf/boot/initrd-2.6.38.img

Cpinitrd-2.6.38.img/boot

Rm-rf/cd/usr/src/linux-2.6.38.tar.gz

Rm-rf/cd/usr/src/linux-2.6.38

6. Set the new kernel to start

Vi/boot/grub. conf

Change default = 1 to default = 0

7. restart the system

Reboot