小技巧：让你的Debia每次开机画面都不一样

　　下面的代码可以让你使用lilo开机的debian机器每次的开机画面都不一样，系统每次开机自动切换一个画面。
　　
　　#!/bin/bash
　　#
　　# bs_switch This script can collect all the bmp files in the directory
　　# /usr/share/lilo/contrib and switch the bs_wwitch in sequence
　　# automatically under Debian Linux(Sarge version).
　　# It's written by Simon Zhan from Minqing County, China.
　　#
　　# Version @(#)bs_switch 0.8 11-May-2004 simonzhan@21cn.com
　　#
　　# notes: bs.lst contain all the files name in the
　　# /usr/share/lilo/contrib, and will delete one entry every
　　# rebooting the system.
　　# FILENAME is the file name which will replace the previous bmp.
　　#
　　# Usage: Copy this script into /etc/init.d, and make a symbolic link into
　　# /etc/rcS.d such as follow(notice the file's permission):
　　# ln -s /etc/init.d/bs_switch /etc/rcS.d/S55bs_switch
　　# and Enjoy!
　　
　　cd /usr/share/lilo/contrib
　　while true
　　do

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　　if [ ! -f /usr/share/lilo/contrib/bs.lst ];then
　　echo ""
　　echo "**************************************"
　　echo "* bs.lst not exist!, now creating... *"
　　echo "**************************************"
　　echo ""
　　sleep 3
　　ls /usr/share/lilo/contrib/*.bmp > /tmp/tmp.file
　　sed '/debian1.bmp/d' /tmp/tmp.file > /usr/share/lilo/contrib/bs.lst
　　fi
　　FILENAME=`sed -n '1p' /usr/share/lilo/contrib/bs.lst`
　　sed 1d /usr/share/lilo/contrib/bs.lst > /tmp/tmp.ls
　　if [ ! -s /tmp/tmp.ls ];then
　　echo ""
　　echo "**********************************************"
　　echo "* size of the bs.lst is zero, now delete it. *"
　　echo "**********************************************"
　　echo ""
　　sleep 3
　　rm /usr/share/lilo/contrib/bs.lst
　　else
　　mv /tmp/tmp.ls /usr/share/lilo/contrib/bs.lst
　　fi
　　if [ -f $FILENAME ];then
　　echo ""
　　echo "*******************"
　　echo "* Ok, I found it! *"
　　echo "*******************"

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　　echo ""
　　sleep 3
　　break
　　fi
　　echo ""
　　echo "*****************************************************************"
　　echo "* OOPS!, I can't find the bmp file, I have to go to the next... *"
　　echo "*****************************************************************"
　　echo ""
　　sleep 3
　　done
　　cp $FILENAME debian1.bmp
　　lilo > /dev/null 2>&1
　　echo ""
　　echo "*********************************"
　　echo "* Bootscreen has been switched! *"
　　echo "*********************************"
　　echo ""