group/users...

chacaln · 04-01-2008, 04:11 PM

Hi all ...

well, i have a huge problem... i hope you can help me...

here is the backgrounds..

1.- i have a user N and he has a file system F.
2.- i have many users who lets its own files on file system F.
3.- i need that each user's file can be read only for its onwer and the user N, no one else... and that the problem...

i have created each user with its own group ..... and then i added

each user to the user's N group ... but it didn't work...

i hope if you can help me ..

Thanx...!!!

beadyallen · 04-01-2008, 04:52 PM

If I understand you correctly, you've done it the wrong way round. You need to add user N to each of the user's groups, not the way you've done it (which was adding each user to group N).

However, even this isn't ideal, since it gives N access to most of the other files created by any other users, (unless you have some sort of clever umask settings). Plus it gets unwieldy if there's lots of users. A better way to do it would be with POSIX ACLs. Have a look here. It's old (FC2), but still a good introduction to ACLs in linux.

chacaln · 04-01-2008, 05:35 PM

Thanx .. a lot !!! ... you understood right!!! i will try it!!!

but i am not brave enough to change the mount setting on production

file systems ..... :-)

but .. it is good to know....

Quote:

Originally Posted by beadyallen

If I understand you correctly, you've done it the wrong way round. You need to add user N to each of the user's groups, not the way you've done it (which was adding each user to group N).

However, even this isn't ideal, since it gives N access to most of the other files created by any other users, (unless you have some sort of clever umask settings). Plus it gets unwieldy if there's lots of users. A better way to do it would be with POSIX ACLs. Have a look here. It's old (FC2), but still a good introduction to ACLs in linux.