There’s case when user cannot remove file(s), even s/he executes the command under root privilege. This surprised me a lot because I’m (and someone is) ROOT ALMIGHTY (!!!)
Lately, I found out the immutable attribute. When files have this attribute enabled, no one can change the file, except disabling that attr by root.
To list the file attributes:
$ lsattr [file]
To enable/disable immutable attribute of file:
$ chattr [+/-]i [file]
Then… KILL IT right away!!! <evil-smile>
