tar: Removing leading `/' from member names

The below command fix the issue
tar -xvzf filename.tar.gz -P

Change boot screen in Ubuntu

Steps give below for how to change boot screen in Ubuntu
open terminal and run this command then you will be able to edit
sudo gedit /etc/default/grub
after you run the command it will ask you for you password. enter
note the picture you want to use needs to be in your home folder
here is a copy of mine
GRUB_DEFAULT=0
#GRUB_HIDDEN_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=-1
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash”
GRUB_CMDLINE_LINUX=”"
GRUB_BACKGROUND=”/home/user/happ.jpeg”
note the last line and you must use the quotes
save changes and while in the terminal type sudo update-grub .
that should do it

How to Change the grub splash image in ubuntu 11.10

Open the terminal

Type  the following cmmand

$wget http://img819.imageshack.us/img819/5632/nebulae.jpg

$mv $HOME/nebulae.jpg $HOME/nebula.jpg

$sudo mv $HOME/nebula.jpg /usr/share/images/grub/nebula.jpg

enter your root password to place the nebula in your grubs boot images….
now were going to remove the old desktop base script and replace it with a more stellar one….
do this block of code to remove.

sudo rm /usr/share/desktop-base/grub_background.sh

For more info Changing grub splash image in ubuntu 11.10