sbctl from home:orcharhino:secureboot project

For 15.4 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:orcharhino:secureboot/15.4/home:orcharhino:secureboot.repo
zypper refresh
zypper install sbctl

For xUbuntu 22.04 run the following:

Keep in mind that the owner of the key may distribute updates, packages and repositories that your system will trust (more information).

echo 'deb http://download.opensuse.org/repositories/home:/orcharhino:/secureboot/xUbuntu_22.04/ /' | sudo tee /etc/apt/sources.list.d/home:orcharhino:secureboot.list
curl -fsSL https://download.opensuse.org/repositories/home:orcharhino:secureboot/xUbuntu_22.04/Release.key | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/home_orcharhino_secureboot.gpg > /dev/null
sudo apt update
sudo apt install sbctl