Re: Easy File Permissions

From: Michael Gerbasio (
Date: 11/29/03

Date: Sat, 29 Nov 2003 16:08:15 GMT

Thanks for all the help.

Here's what I did: installed and created the user root. Installation asked
me to create another user which I did, "myuser" and installation created the
"user" group. Seems pretty standard, root in the root group and myuser in
the user group.

I'm logged in as myuser and I can open and modify the files in
/etc/samba/smb.conf. The setting on the file is rw-r--r-- and the setting
on the directory is rwxr-xr-x owned by root and part of the root group, so
I'm confused as to why I can edit the file logged in as myuser. If I take a
file owned my myuser and copy it to the samba directory, the owner and group
change to root. I was reading about SETUID/GID so that might apply here but
I haven't even went that far yet since I wasn't expecting to be able to
write in that directory.

The concept, which I've probably read 1000 times, seems so simple but I'm
just not seeing it happen on the PC. I was think maybe the Easy setting had
something to do with it or maybe suse is using acl which I know nothing
about. From my reading it looks like that is something particular to suse.

Regards-Michael G.

> Are you *sure* an ordinary user can actually write a file in one of
> those directories? The "execute" permission on a directory means you
> can cd to it and the "read" permission lets the group look at it, but
> if the "write" permission is turned off for that group, you should
> not be able to create a new file *or* change an existing one.
> > Looking at YaST I see if I go to Security and Users, click Security
> > Settings, under miscellaneous settings the setting of file
> > permissions is set to "easy". Is this correct and does that explain
> > why it seems that the user group has full access to directories
> > owned by others? Thanks.
> >
> I've never really delved into the settings for "easy" and "secure".
> I think it has more to do with how Yast will change permissions on
> files automatically, but I'm not sure. Hopefully, someone will know
> this answer . . .
> --
> Kevin Nathan (Montana, USA)
> Open standards. Open source. Open minds.
> The command line is the front line.
> Linux 2.4.10-4GB
> 10:00pm up 5 days, 8:53, 5 users, load average: 0.01, 0.07, 0.15