Unix: Prevent delete on a user file from a user
[UNIX] Assume that there exists a user X (i.e. not a superuser), which belongs to a group G. This user X creates a file F in a directory, with permissions "rw-rw----".
Is there a way to prevent delete on this file from any user (except superusers), with a command issued by user X?
I found "chattr +a", but it can only be issued by superuser.
In other words, I am user X, member of group G, I own a file which must have permissions "rw-rw----". I want to prevent this file from deletion by myself and any other user of group G.
Copyright License：
Author:「edoedoedo」,Reproduced under the CC 4.0 BY-SA copyright license with link to original source & disclaimer.
Link to：https://stackoverflow.com/questions/29576849/unix-prevent-delete-on-a-user-file-from-a-user
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