File & Directory permissions and groups
I've been using Linux for about 1 and a half year now and I don't fully understand how file & directory permissions and groups work.
when I view properties of a folder in GNOME2, I see "Group" and then a group selected. What I don't get is what are the other groups in the drop down menu - I mean, are they the groups that also have permission to the folder, or is the selected group the only group that has permission?
I want to allow the group www-data to have permission to a folder, but I cannot see the group in the menu. How do I go about getting it in there, or how can I give www-data permission via terminal.. I think its with chgrp.
Argh! I use to love being able to tinker and explor computers to teach myself, but as I get older there seems to be less hours in a day!