1. 檢視當前系統核心

# uname -r

2 2.6.32-71.el6.i686

2. 下載linux-3.2.2核心包

# cd ~

# wget -c

# tar jxvf linux-3.2.2.tar.bz2

# cd linux-3.2.2

3. 配置核心並安裝

# make mrproper #清除環境變數，即清除配置檔案

# make menuconfig #在選單模式下選擇需要編譯的核心模組

找到以下選中選項並選中networking support → networking options → network packet filtering framework(netfilter)

(1).Core netfilter configuration

勾中”Netfilter connection tracking support” -m state相關模組是依賴它的，不選則沒有。

將netbios name service protocal support(new) 編譯成模組,不然後面升級iptables後啟動時會出錯

勾中“Netfilter Xtables support (required for ip_tables)”

(2).IP: Netfilter Configuration

將 “IPv4 connection tracking support (require for NAT)” 編譯成模組。

勾中IP tables support (required for filtering/masq/NAT) 。

將 “Full NAT” 下的 “MASQUERADE target support” 和 “REDIRECT target support” 編譯成模組

(3).其它模組可以根據自己的需要進行選擇,若不懂可以參考核心配置手冊.

# make clean #確保所有東西均保持最新狀態.

# make bzImage #生成核心檔案

# make modules #編譯模組

# make modules_install #安裝模組

# make install #安裝

4. 編輯 /etc/grub.conf 檔案，將 default=1 改為 default=0

# cat /etc/grub.conf

# grub.conf generated by anaconda

#

# Note that you do not have to rerun grub after making changes to this file

# NOTICE: You have a /boot partition. This means that

# all kernel and initrd paths are relative to /boot/, eg.

# root (hd0,0)

# kernel /vmlinuz-version ro root=/dev/mapper/VolGroup-lv_root

# initrd /initrd-[generic-]version.img

#boot=/dev/sda

default=1

timeout=5

splashimage=(hd0,0)/grub/splash.xpm.gz

hiddenmenu

title CentOS Linux (3.2.2)

root (hd0,0)

kernel /vmlinuz-3.2.2 ro root=/dev/mapper/VolGroup-lv_root rd_LVM_LV=VolGroup/lv_root rd_LVM_LV=VolGroup/lv_swap rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us crashkernel=auto rhgb quiet

initrd /initramfs-3.2.2.img

title centos (2.6.32-71.el6.i686)

root (hd0,0)

kernel /vmlinuz-2.6.32-71.el6.i686 ro root=/dev/mapper/VolGroup-lv_root rd_LVM_LV=VolGroup/lv_root rd_LVM_LV=VolGroup/lv_swap rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us crashkernel=auto rhgb quiet

initrd /initramfs-2.6.32-71.el6.i686.img

5. 重啟系統,並檢視核心

# reboot

# uname -r

3.2.2

Cent OS 6升級核心

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