Best way to change kaltura 11.2.0 using http to use https

Thank you for your reply but this is the error I got :

root@hdv:/opt/kaltura/bin|⇒  ./kaltura-base-config.sh
./kaltura-base-config.sh: ligne 74: rpm : commande introuvable
Exiting as kaltura-base is not installed.
This MAY be because the installation of it was skipped do to SELinux being in 'Enforcing' mode.
Please review: https://github.com/kaltura/platform-install-packages/blob/master/doc/install-kaltura-redhat-based.md#disable-selinux---required-currently-kaltura-cant-run-properly-with-selinux
And re-run:
# yum install kaltura-server

The installation was OK and kaltura is working fine. SE linux is and was not set-up.
I am using ubuntu 14