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Updating Kernel

  1. Check installed kernels 
    [root@kvm4 ~]# rpm -q kernel
kernel-2.6.32-71.el6.x86_64
[root@kvm4 ~]# uname -r
2.6.32-71.el6.x86_64
  2. Download the kernel packages 
    [root@kvm4 ~]# cd /usr/src
[root@kvm4 src]# wget ftp://deyu.wang/pub/centos6/crt/extra/kernel-*.rpm
--2012-01-01 17:52:50--  ftp://deyu.wang/pub/centos6/crt/extra/kernel-*.rpm
           => “.listing”
Resolving deyu.wang... 192.168.122.1
Connecting to deyu.wang|192.168.122.1|:21... connected.
Logging in as anonymous ... Logged in!
==> SYST ... done.    ==> PWD ... done.
==> TYPE I ... done.  ==> CWD (1) /pub/centos6/dag ... done.
==> PASV ... done.    ==> LIST ... done.

    [ <=>                                   ] 1,589       --.-K/s   in 0.001s  

2012-01-01 17:52:50 (2.69 MB/s) - “.listing” saved [1589]

Removed “.listing”.
--2012-01-01 17:52:50--  ftp://deyu.wang/pub/centos6/crt/extra/kernel-2.6.32-71.29.1.el6.x86_64.rpm
           => “kernel-2.6.32-71.29.1.el6.x86_64.rpm”
==> CWD not required.
==> PASV ... done.    ==> RETR kernel-2.6.32-71.29.1.el6.x86_64.rpm ... done.
Length: 23472196 (22M)

100%[======================================>] 23,472,196  33.2M/s   in 0.7s    

2012-01-01 17:52:51 (33.2 MB/s) - “kernel-2.6.32-71.29.1.el6.x86_64.rpm” saved [23472196]

--2012-01-01 17:52:51--  ftp://deyu.wang/pub/centos6/crt/extra/kernel-firmware-2.6.32-71.29.1.el6.noarch.rpm
           => “kernel-firmware-2.6.32-71.29.1.el6.noarch.rpm”
==> CWD not required.
==> PASV ... done.    ==> RETR kernel-firmware-2.6.32-71.29.1.el6.noarch.rpm ... done.
Length: 1207932 (1.2M)

100%[======================================>] 1,207,932   --.-K/s   in 0.03s   

2012-01-01 17:52:51 (33.0 MB/s) - “kernel-firmware-2.6.32-71.29.1.el6.noarch.rpm” saved [1207932]
  3. Install a new kernel 
    [root@kvm4 src]# rpm -ivh kernel-2.6.32-71.29.1.el6.x86_64.rpm 
error: Failed dependencies:
	kernel-firmware >= 2.6.32-71.29.1.el6 is needed by kernel-2.6.32-71.29.1.el6.x86_64
[root@kvm4 src]# rpm -ivh kernel-firmware-2.6.32-71.29.1.el6.noarch.rpm Preparing...                ########################################### [100%]
   1:kernel-firmware        ########################################### [100%]
[root@kvm4 src]# rpm -ivh kernel-2.6.32-71.29.1.el6.x86_64.rpm 
Preparing...                ########################################### [100%]
   1:kernel                 ########################################### [100%]
  4. Check installed kernels 
    [root@kvm4 src]# rpm -q kernel
kernel-2.6.32-71.el6.x86_64
kernel-2.6.32-71.29.1.el6.x86_64
[root@kvm4 src]# uname -r
2.6.32-71.el6.x86_64
  5. Reboot to the new kernel 
    [root@kvm4 src]# cat /boot/grub/menu.lst 
.....
default=0
timeout=2
#hiddenmenu
title CentOS Linux (2.6.32-71.29.1.el6.x86_64)
	root (hd0,0)
	kernel /vmlinuz-2.6.32-71.29.1.el6.x86_64 ro root=/dev/mapper/vg_kvmusb-root rd_LVM_LV=vg_kvmusb/root rd_LVM_LV=vg_kvmusb/swap rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us crashkernel=auto
	initrd /initramfs-2.6.32-71.29.1.el6.x86_64.img
title KVM CentOS (2.6.32-71.el6.x86_64)
	root (hd0,0)
	kernel /vmlinuz-2.6.32-71.el6.x86_64 ro root=/dev/mapper/vg_kvmusb-root rd_LVM_LV=vg_kvmusb/root rd_LVM_LV=vg_kvmusb/swap rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us crashkernel=auto
	initrd /initramfs-2.6.32-71.el6.x86_64.img
  6. Reboot to the new kernel 
    [root@kvm4 src]# reboot
[root@kvm4 ~]# rpm -q kernel
kernel-2.6.32-71.el6.x86_64
kernel-2.6.32-71.29.1.el6.x86_64
[root@kvm4 ~]# uname -r
2.6.32-71.29.1.el6.x86_64
  7. Remove a kernel 
    [root@kvm4 src]# rpm -e kernel
error: "kernel" specifies multiple packages:
  kernel-2.6.32-71.el6.x86_64
  kernel-2.6.32-71.29.1.el6.x86_64
[root@kvm4 src]# rpm -e kernel-2.6.32-71.el6.x86_64
[root@kvm4 ~]# rpm -q kernel
kernel-2.6.32-71.29.1.el6.x86_64
[root@kvm4 ~]# uname -r
2.6.32-71.29.1.el6.x86_64


2015-04-13