求救linux不能起动了!

我做Automounter实验时,用了一个umount -a 后,重起autofs都不行了.说是/tmp/不能新建一个文件,但我是用ROOT用户。后来我重起计算机就起动不了了！
起动到了以下就停了：
loading ext3.o module
mouting /proc filesystem
creating block devices
creating root device
mounting root filesystem
kjournald starting. commit interval 5 seconds
EXT3-fs: mounted filesystem with ordered data mode.
privotroot:pivot_root(/sysroot./sysroot/initrd) failed: 2
umount /initrd/proc failed: 2
Freeing unused kernel memory: 132k freed
Kernel panic: No init found . Try passing init=option to kernel.