unetbootin
Universal Netboot Installer
UNetbootin allows for the installation of various Linux/BSD distributions to a partition or USB drive, so it's no different from a standard install, only it doesn't need a CD. It can create a dual-boot install, or replace the existing OS entirely.
There is no official package available for openSUSE Leap 15.4Distributions
openSUSE Tumbleweed
openSUSE Leap 15.5
openSUSE Leap 15.4
openSUSE Leap 15.3
SUSE SLE-15-SP2
SUSE SLE-15-SP1
SUSE SLE-12-SP5
Debian 10
Ubuntu 20.04
Unsupported distributions
The following distributions are not officially supported. Use these packages at your own risk.