sounds like you have messed up ownership and/or permissions in /home/jay/abgxgui - if you got it from a tarball it may be easiest to delete and untar...
Unless you are using the Server edition of Ubuntu then there is nothing wrong with your /etc/network/interfaces file - the Desktop editions get their...
When you execute the script in the current directory it presumably finds bugs.sql also in the current directory - to execute from cron you will need...
The same happens in Ubuntu too. In my skel directory there are 3 hidden (dot) files: .bash_logout .bashrc and .profile. Non of this files are needed...