By default Redhat Enterprise Linux machines do not allow binary files on CD's to be executed. You can change the defaults, or simply mount the CD manually with the exec bit set.
mount DEVICE MOUNT_POINT -o exec
Example: mount /dev/hdc /media -o exec
Setting the exec bit allows all binary files on DEVICE to be executed.
Linux installers are required to run as root. However, when an installer is run through 'sudo' or 'sudo su' and env_reset is set in sudoers, the DISPLAY environment variable is not passed into the sudo session. Use 'sudo -E' or 'sudo -E su' to override env_reset and preserve the environment.
