Warning :
Do not remove the /initrd/ directory from the file system
for any reason. Removing this directory will cause the system
to fail with a kernel panic error message at boot time.
中知道不要删除,却没想到带来这么大的麻烦!
看参考手册第三章时,
Chapter 3 ,File System Structure
最后一部分,
Finally , one more directory worth noting is the /initrd/ directory.
It is empty ,but is used as a critical mount point during the boot process.