When trying to upgrade cPanel /WHM version, do you face the following error :

Switching to to determine if we can reach that version without failure.

FATAL: Could not figure out RPM distribution version
The Administrator will be notified to review this output when this script completes

FATAL: Failed to download updatenow.static from server: HASH(0x1dcb0108)

You might need to check the file /var/cpanel/sysinfo.config and ensure that the variable ‘rpm_dist_ver‘ points to a valid number and not unknown. If you are on CentOS 5.xx, rpm_dist_ver will be 5.

Once you save this file with the valid setting, re-run the upgrade,       # /scripts/upcp