删除系统多余内核

查询系统中全部的内核:

$ rpm -q kernel

kernel-2.6.32-431.el6.x86_64
kernel-2.6.32-504.16.2.el6.x86_64
kernel-2.6.32-504.23.4.el6.x86_64
kernel-2.6.32-504.30.3.el6.x86_64

删掉:

sudo yum remove kernel-2.6.32-504.30.3.el6.x86_64
删除后：

$ sudo 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 (hd0,1)
#          kernel /vmlinuz-version ro root=/dev/mapper/vg_l-lv_root
#          initrd /initrd-[generic-]version.img
#boot=/dev/sdb1
device (hd0) HD(1,800,64000,8e3964af-b55a-4977-826c-49c250cf7fac)
default=0
timeout=5
splashimage=(hd0,1)/grub/splash.xpm.gz
hiddenmenu
title CentOS (2.6.32-504.23.4.el6.x86_64)
    root (hd0,1)
    kernel /vmlinuz-2.6.32-504.23.4.el6.x86_64 ro root=/dev/mapper/vg_l-lv_root nomodeset rd_NO_LUKS LANG=en_US.UTF-8 rd_LVM_LV=vg_l/lv_root rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=128M rd_LVM_LV=vg_l/lv_swap  KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet
    initrd /initramfs-2.6.32-504.23.4.el6.x86_64.img
title CentOS (2.6.32-504.16.2.el6.x86_64)
    root (hd0,1)
    kernel /vmlinuz-2.6.32-504.16.2.el6.x86_64 ro root=/dev/mapper/vg_l-lv_root nomodeset rd_NO_LUKS LANG=en_US.UTF-8 rd_LVM_LV=vg_l/lv_root rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=128M rd_LVM_LV=vg_l/lv_swap  KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet
    initrd /initramfs-2.6.32-504.16.2.el6.x86_64.img
title CentOS (2.6.32-431.el6.x86_64)
    root (hd0,1)
    kernel /vmlinuz-2.6.32-431.el6.x86_64 ro root=/dev/mapper/vg_l-lv_root nomodeset rd_NO_LUKS LANG=en_US.UTF-8 rd_LVM_LV=vg_l/lv_root rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=128M rd_LVM_LV=vg_l/lv_swap  KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet
    initrd /initramfs-2.6.32-431.el6.x86_64.img