commands

[Redding, Erik]

On 1/14/10 2:55 PM, "Mike Burger" <mburger at bubbanfriends.org> wrote:

>>> Hi all,
>>> I have a problem changing permissions to some files using chmod and now I
>>> have a doubt about the owner and group of a file,
>>> I´ll try to explain.
>>> I have 2 users, user1 and user2, both belongs to group1.
>>> I have a file with this permissions:
>>> -rwxrwxrwx 1 user1 group1 file.txt
>>> with user2 I can read, write this file. but If I try to change the
> permissions with this:
>>> chmod 770 file.txt I get the error:
>>> operation not permitted,
>>> so my doubt is, only the owner can change the permissions to a file?
>> 
>> Think about the *meaning* of what you tried to do: you, as a member of
> the
>> group, but not as the owner, are trying to make it so that the owner
> cannot even look at the file, not execute, not write, not even read.
> Does
>> that make sense?
> 
> That would be incorrect...he, as a member of the group, but not the owner,
> is trying to remove world rwx access (if he was trying to lock out the
> owner, he'd have placed the 0 at the front (i.e. 077).
> 
> Permissions 770 give owner and group full access, and removes access for
> all others on the system (outside of root, that is).
> 
> 
> --
> Mike Burger
> http://www.bubbanfriends.org
> 
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