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File permissions

 
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# 1  
Old 10-05-2010
File permissions
What command can i use to make sure that i cannot delete a file called backup (which i own) without affecting other permissions?

seems simple dont know how i forgot. Smilie

---------- Post updated at 07:59 PM ---------- Previous update was at 06:34 PM ----------

anyone ???

---------- Post updated at 08:37 PM ---------- Previous update was at 07:59 PM ----------

not one person to help out ? atleast someone to say idk lol. some kind of feedback would be appreciated.

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Last edited by bakunin; 10-08-2010 at 11:16 AM..
# 2  
Old 10-05-2010
Code:
chmod 444 backup

will make the file read only. The rm command should prompt before deleting it, but rm -f will always remove it.
# 3  
Old 10-05-2010
no. i want to make the file immutable. meaning the file cannot be deleted. even from root.
# 4  
Old 10-06-2010
The root account can delete anything even if the directory and file permissions are 000 .

Could possibly place the files on an isolated filesystem, then re-mount the filesystem read-only (or even not mount it at all). This would not stop the root account re-mounting the filesystem read/write unless the medium was something like a CD.
# 5  
Old 10-08-2010
I think by adding a sticky bit to the directory will resolve your problem but I doubt only super user can adda sticky bit....
# 6  
Old 10-08-2010
The root user can delete any file. The sticky bit on a directory stops non-root users deleting each others files.
# 7  
Old 10-12-2010
If the objectives to prevent other super know this FS, better dun mount it. Mount when it needed. otherwise, it hard to prevent delete by Super user...
 
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