service dbora does not support chkconfig

This error occurs while running oracle database auto start script.

chkconfig --level 345 dbora on

service dbora does not support chkconfig.

Edit the dbora script. There is a typo in chkconfig: -20 80. It has a space in front of 20. e.g;

chkconfig: - 20 80

Now you can use the command 

chkconfig --level 345 dbora on

DRHD: handling fault status regf0003c80 Kernel panic -not syncing : DMAR hardware

• Power on the system and press tab at boot menu
• Pass boot parameter to the kernel

        intel_iommu=off

• boot the system
• After booting successufully, edit grub.conf for permanent setting.

"Reverse Mapping Checking: Possible Break-in Attempt!" Error with SSH

The reverse DNS had not been set up for the server.

Add remote host to your /etc/hosts file.