第一种方法：通过命令的方式解决多余的内核
1.首先查看当前内核的版本号:
[root@jxatei ~]# uname -a
Linux jxatei.server2.6.32-573.1.1.el6.x86_64 #1 SMP Sat Jul 25 17:05:50 UTC 2015 x86_64 x86_64x86_64 GNU/Linux
2.查询系统中全部的内核:
[root@jxatei ~]# rpm -qa|grep kernel
kernel-2.6.32-504.30.3.el6.x86_64
kernel-headers-2.6.32-573.1.1.el6.x86_64
kernel-2.6.32-573.1.1.el6.x86_64
kernel-2.6.32-504.el6.x86_64
dracut-kernel-004-388.el6.noarch
kernel-firmware-2.6.32-573.1.1.el6.noarch
3. 以上是我CentOS的内核版本号，其中红色为要删除的版本号:
[root@jxatei ~]# yum remove kernel-2.6.32-504.30.3.el6.x86_64
Loaded plugins: fastestmirror
Setting up Remove Process
Resolving Dependencies
--> Running transaction check
---> Package kernel.x86_640:2.6.32-504.30.3.el6 will be erased
--> Finished Dependency Resolution
Dependencies Resolved
=============================================================================================================================
Package Arch Version Repository Size
=============================================================================================================================
Removing:
kernel x86_64 2.6.32-504.30.3.el6 @updates 124 M
Transaction Summary
=============================================================================================================================
Remove 1 Package(s)
Installed size: 124 M
Is this ok [y/N]: y
Downloading Packages:
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Repository base is listed more thanonce in the configuration
Repository updates is listed morethan once in the configuration
Repository extras is listed more thanonce in the configuration
Repository centosplus is listed morethan once in the configuration
Repository contrib is listed morethan once in the configuration
Erasing:kernel-2.6.32-504.30.3.el6.x86_64 1/1 Verifying:kernel-2.6.32-504.30.3.el6.x86_64 1/1 Removed:
kernel.x86_64 0:2.6.32-504.30.3.el6 Complete!
4.重启后就可以看到,内核被删掉了,同时多余的启动项也自动被删掉了。
重启系统后，可以通过查看以下两个文件是否还有多余内核代码:
[root@jxatei ~]#vi /boot/grub/grub.conf
[root@jxatei ]# vi /boot/grub/menu.lst
第二种方法：通过修改“menu.lst”文件，删除红色部分来解决多余的内核
[root@jxatei ~]# vi /boot/grub/menu.lst
# grub.confgenerated by anaconda
#
# Note thatyou 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 arerelative to /boot/, eg.
# root (hd0,0)
# kernel /vmlinuz-version roroot=/dev/sda3
# initrd /initrd-[generic-]version.img
#boot=/dev/sda
default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS(2.6.32-573.1.1.el6.x86_64)
root (hd0,0)
"/boot/grub/menu.lst"25L, 1368C
# grub.confgenerated by anaconda
#
# Note thatyou 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 arerelative to /boot/, eg.
# root (hd0,0)
# kernel /vmlinuz-version roroot=/dev/sda3
# initrd /initrd-[generic-]version.img
#boot=/dev/sda
default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS(2.6.32-573.1.1.el6.x86_64)
root (hd0,0)
kernel/vmlinuz-2.6.32-573.1.1.el6.x86_64 roroot=UUID=72640132-d6de-46b4-bceb-c7fff46de559 rd_NO_LUKS KEYBOARDTYPE=
pc KEYTABLE=usrd_NO_MD crashkernel=auto.UTF-8 rd_NO_LVM rd_NO_DM rhgb quiet
initrd/initramfs-2.6.32-573.1.1.el6.x86_64.img
titleCentOS (2.6.32-504.30.3.el6.x86_64)
root (hd0,0)
kernel /vmlinuz-2.6.32-504.30.3.el6.x86_64ro root=UUID=72640132-d6de-46b4-bceb-c7fff46de559 rd_NO_LUKS KEYBOARDTYPE =pc KEYTABLE=us rd_NO_MDcrashkernel=auto.UTF-8 rd_NO_LVM rd_NO_DM rhgb quiet initrd/initramfs-2.6.32-504.30.3.el6.x86_64.img
第三种方法：通过修改”grub.cfg”文件解决多余的内核
[root@jxatei ~]#vi /boot/grub/grub.conf
# grub.confgenerated by anaconda
#
# Note thatyou 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 arerelative to /boot/, eg.
# root (hd0,0)
# kernel /vmlinuz-version roroot=/dev/sda3
# initrd /initrd-[generic-]version.img
#boot=/dev/sda
default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS(2.6.32-573.1.1.el6.x86_64)
root (hd0,0)
"grub.conf"17L, 755C
# grub.confgenerated by anaconda
#
# Note thatyou 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 arerelative to /boot/, eg.
# root (hd0,0)
# kernel /vmlinuz-version roroot=/dev/sda3
# initrd /initrd-[generic-]version.img
#boot=/dev/sda
default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS(2.6.32-573.1.1.el6.x86_64)
root (hd0,0)
kernel/vmlinuz-2.6.32-573.1.1.el6.x86_64 roroot=UUID=72640132-d6de-46b4-bceb-c7fff46de559 rd_NO_LUKS KEYBOARDTYPE=
pc KEYTABLE=usrd_NO_MD crashkernel=auto.UTF-8 rd_NO_LVM rd_NO_DM rhgb quiet
initrd/initramfs-2.6.32-573.1.1.el6.x86_64.img ~
小结，其实第二、三种方法非常相似，都是修改文件，而且内容都是一样的。sky建议，如果我们要成为Linux专家，只有多使用命令的习惯性操作。