Busybox v1.1.3 (debian1:1.1.3-5 ubuntu12)问题的解决

用ubuntu8.04已经好长时间了，一直都很顺利。但今天开机后，却黑屏白字，显示：
Busybox v1.1.3 (debian1:1.1.3-5 ubuntu12)built-in shell (ash)
enter ‘help’for a list of built-in commands
(initranfs)

输入help，又得到：

.:alias break cd chdir command contine echo eval exec exit export false getopts
hash help let local pwd read readonly return set shift times trap ture type ulimit
umask unalias unset wait [[[ash awk hasename busybox cat chmod chroot chrt clear cmp
cp cut deallocvt dumpkmap echo egrep env expr false fbset fdflush fgrep grep hostname
ifconfig ip kill ln loadfont loadkmap is mkdir mkfifo mknod mkswap mktemp more mount
mv openrt pidof printf ps pwd readlink resset rm rmdir set setkeycodes sh sleep sort
stat sync tail tee test touch tr true tty umount uname uniq wget yes

迫于无奈，回到windows下查了好久，都未能解决。最后在/boot下发现两个文件initrd.img-2.6.24-19-generic和initrd.img-2.6.24-19-generic.bak
遂备份initrd.img-2.6.24-19-generic.bak后删除initrd.img-2.6.24-19-generic.bak
重启
成功！
谨以此献给那些遇到同样问题的读者，以供参考