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Old 04-06-2005, 11:35 AM   #1
Registered: Mar 2005
Posts: 49

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Thin Client User Security

I am new in using linux but i have managed to setup 5 thin clients which connect to the linux server. The question i have is how do i let users log on to the server but with limited acess to certain files and programs. So far when a user logs on to the server that user still seems to have all privilages such as the root.

What i would like is to set a group like students and all the users under students have limited access to programs and files. please be easy on me and explain thing s to me simple so i can get this to work i have been with windows for over 10 years an now am coming to linux so there are many things i do not know how to do.

Thank you
Old 04-07-2005, 05:45 PM   #2
Registered: Feb 2004
Location: Toronto
Distribution: Arch
Posts: 146

Rep: Reputation: 16
Under linux, by default, when you add a new user, he has limited permissions. This is what you want.

To check what permissions user "joe" has on file (or directory) "filename", do the following :

first, determine what groups joe belongs to. To do that, type
groups joe
It will return a (possibly empty) list of groups, like "joe : users cdrom audio video"

then, determine what ownership and permissions are put on file "filename". To do that, type
ls -l filename
That will return something like
-rwxr-xr-x   1 joe users      1400 2005-03-15 11:24 filename
here you read that "filename" is owned by user "joe" and by group "users".
the sequence "rwxr-xr-x" tells you the permissions. The first 3 letters are the permissions of the owner (here joe), the 3 next letters are the permissions of every other member of the group (here the members of the group "users"), and the 3 last are the permissions of all other users.
r means read, w means write, x means execute for a standard file, and traverse for a directory.

You can also read that in a graphical file browser like konqueror.

If all your users have the same permissions as root, that's very, very bad !

Last edited by Ben2210; 04-07-2005 at 05:48 PM.


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