I will start of by saying that this is a homework assignment but I am stuck. There are two different parts that I am stuck on and may have the same solution.
=== FIRST PROBLEM ===
I have two users called ken and larry. I have added larry to the group ken and have given rwS permissions over ken's folder (drwxrwSr-x 2 ken ken 4096 2012-10-14 20:02 ken). When I switch user (su) to larry and try to create a file in ken's directory I get a "Permissions denied error". I have tried logging out and back in and switching larry's main group to ken but nothing gets me passed the "permissions denied error".
=== END ===
=== Second Problem ===
I have a folder called /ballots and I am supposed to give others write permissions but not list (read is not mentioned). I gave others -w- privilege but user's can't write files to the directory with an editor (vi). The permissions on the directory are drwxrwx-w- 2 root root 4096 2012-10-14 20:06 ballots
=== END ===
Any help or pointers would be greatly appriciated. I don't expect you to just answer my questions and do my homework for me I am just trying to get some help since I am stuck.