Initramfs

Adding binaries to the initial ram disk in ubuntu

Adding vi to initramfs

$ sudo cat >/etc/initramfs-tools/hooks/vi <<EOH
#!/bin/sh

PREREQ=""
prereqs()
{
     echo "$PREREQ"
}

case $1 in
prereqs)
     prereqs
     exit 0
     ;;
esac

. /usr/share/initramfs-tools/hook-functions
# Begin real processing below this line

copy_exec /usr/bin/vim.basic /bin

exit 0
EOH
$ sudo update-initramfs -k $(uname -r) -u