I have now read many tutorials about Linux user and group administration, but I still don't completely understand the group permissions. For example, I can give a group write rights by
chmod g+w [filename]
but what I don't understand is:
- to which group does it apply?
- can I specify one specific group or does it apply to all groups (that wouldn't make any sense, would it)?
- how do I give a specific group a right to create new directories under a specific directory?