One silly chmod question

[Mike Burger]

>> 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
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