dbms_scheduler: How can I change the default user and shell running the scripts?

[shew01]

whats up with cron? all jobs will run as the oracle user on the database

Are you sure? If that is the case, shouldn't the log file be owned by the Unix oracle account, rather than "nobody?"

ls -l display_shell.log
-rw-rw-rw- 1 nobody nobody 225 Dec 12 07:14 display_shell.log

Also, the job cannot read or write any files in the oracle account's $HOME directory tree.