Kernel

booting, grub and kernels

Remove all older Kernels:

dpkg -l 'linux-*' | sed '/^ii/!d;/'"$(uname -r | sed "s/$.*$-$[^0-9]\+$/\1/")"'/d;s/^[^ ]* [^ ]* $[^ ]*$.*/\1/;/[0-9]/!d' | xargs sudo apt-get -y purge

Install Grub:

grub-install /dev/sdb
file -s /dev/sdb

Install Older Kernels:

    yum list --showduplicates kernel
    yum install kernel-2.6.18-400.el5
    yum install kernel-2.6.18-402.el5
    yum install kernel-2.6.18-404.el5