Thursday, October 7, 2010

What is a sticky bit and how to set a sticky bit on a directory on redhat linux

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Users with write permission in a directory can delete the files created by other users. This lets users to destroy the data created by other users.
But with sticky bit set on a directory one can only delete the files created by him.

Setting sticky bit on a directory

By symbolic method:
#chmod o+t directory_path
eg:
#chmod o+t /resumes

By numeric method:
If the current permission of the directory is 664, then
#chmod 1664 /resumes

1 on the left end of the permission sets the sticky bit.

Now on the file can be deleted only by the owner of the file.
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