I'm currently running core 6 on the 2.6.20 kernel, on gnome 2.16.3. I used the gui in system->administration->users and groups to add a group, and place users in that group. I gave the group permissions, rws,on the foler.
Now when i go to the command line, to edit a file in the folder i says permission denied

the group is there:

$ cat /etc/group | grep code
code:x:501hes

but when i do and id I get..
$ id
uid=500(phes) gid=500(phes) groups=500(phes)

i'm guessing i need to reload user/group settings or something. how do I do that w/o rebooting ?

Logout and log-in again, and it should show you in the new group. I just did it and it worked here.

Be sure to chown and chmod any existing files in the directory, otherwise they might retain their original permissions/ownership. Unless you took care of that with a recursive (-R) chown/chmod on the directory. "ls -l" will list everything along with the owner/group/permissions.

Can you do this without rebooting ?

Yes.

I have KDE as my desktop environment. Just click the KMenu button, Logout, and End Current Session. It will log you out, restart X, and let you log-in again.

I'm sure GNOME and all the other GUIs have a similar process.

ah .... ok thanks guys. What about doing this without ending the current session ... ??

I'd be interested to know if this is possible as well!

anybody know?

man newgrp

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only way I'm aware of:

su - $USER