I have done my search but couldn't find any answer.
After executing "rm --no-preserve-root -rf /", bash has told me things like:
- rm: cannot remove /proc/*: Operation not permitted ...
- rm: cannot remove /etc: Device or resource busy ...
Firstly, operation was clearly completed successfully since all files are deleted. If so why does it say such things?
Secondly, how can I still operate on my virtual CentOS machine when kernel(more like everything) is gone. Is there any kind of session that allows computer to keep operating?
Thirdly, system threw me to "/" directory in the end. When I called "ll -a", "no such file or directory". But if I call "cd /etc", bash lets me go there(!?). I even called "cd .." and got back to "/".
I assume these have something to do with hardlinks and inodes but I have yet to find any clear explanation to this.
I don't want to be a "luser"(Introduction of Linux by Machtelt Garrels P.9) who haven't seen the light :(