Oracle Enterprise Manager on EC2 - IP address change after reboot

The script (/usr/local/bin/sethostname) to be run by cron:

·        Login as root.

·        vi /usr/local/bin/sethostname

·        Place the following line in the /usr/local/bin/sethostname

       echo desired_hostname > /proc/sys/kernel/hostname

·        chmod 755 /usr/local/bin/sethostname

·        Issue crontab –e and place the following line in the cron tab and save.

   # SET HOSTNAME

   * * * * * /usr/local/bin/sethostname >> /usr/local/bin/sethostname.log 2>&1

·        The desired_hostname and IP entry needs to be in the /etc/hosts file

desired_hostname = Hostname of your choice.

This is work around to this known limitation: http://taliphakanozturken.wordpress.com/2011/12/31/oem-configuration-when-the-database-host-name-or-ip-address-changes/