Question
How do I disable or reenable the fast installation method when installing cPanel & WHM?
Answer
To disable FastUpdate on your server, use SSH to connect to your server as the
root user and run the following command:
touch /var/cpanel/never_ever_use_fast_update_not_even_a_check
To reenable FastUpdate on your server, use SSH to connect to your server as the root user and run the following command:
rm /var/cpanel/never_ever_use_fast_update_not_even_a_check