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Old 02-26-2008, 04:25 AM   #1
lewkh
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Registered: Oct 2004
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Lock a files in Linux


Hi Folks

Could you tell me how do I lock a file in Linux? Which means, chmod or rm of root user also operation not permitted.

Anybody know how to do that?

Thanks
 
Old 02-26-2008, 04:35 AM   #2
Simon Bridge
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Can root create a file which even root cannot modify? This, in different forms, is a question that has puzzles theists and people of such ilk through the ages.

See this, last panel.

Presumably chmod 0000 filename will do it. But I am reluctant to try... I like being able to modify files. Why would anyone even want to try this?
 
Old 02-26-2008, 10:10 AM   #3
lewkh
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No, it is not chmod change to 0000 because you are not permitted even is root user. I wonder know because my files disappear unconsciously. But my superior can "lock" the files even root user cannot chmod or rm.

Thus I wondering how he do that to "lock" file? I am thinking that inode. Could any body give the info?

Thanks
 
Old 02-26-2008, 10:29 AM   #4
Emerson
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Extended attributes allow to do this by setting immutable flag. See man attr.

Edit: man chattr for EXT filesystem.

Last edited by Emerson; 02-26-2008 at 10:32 AM.
 
Old 02-27-2008, 06:45 AM   #5
unSpawn
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@Lewk: since your FUP question wasn't about Linux Security, and LQ likes you to create a new thread for questions that have no bearing on your OP, I've pruned it. It now lives at http://www.linuxquestions.org/questi...-inode-624176/.
 
  


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