kernel boot parameter : init=/bin/bash

[lin q]

Hi,
  I happen to find an interesting thing: if I add "init=/bin/bash" to the 
kernel boot parameter, then Fedora Core 1 quickly boots to command line 
bash, no GUI starts. And / is read only. And I works in single user 
environment.

  Then I tried changing the parameter to "init=/bin/bash, rw", but this time 
the boot is like normal way, GUI starts, I am asked to log in, etc.

  I wonder why it has so big difference with and without "rw"?

Thanks.

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