It's a system that orchestrates the creation, management and maintenance of virtual machines and associated Ubuntu images to simplify development.
It's available as a classically confined snap, in the beta
channel:
sudo snap install multipass --beta --classic
multipass launch --name foo
multipass exec foo lsb_release -a
multipass find
multipass help
multipass help <command>
Here's a set of steps to build and run your own build of multipass:
cd <multipass>
apt install devscripts equivs
mk-build-deps -s sudo -i
cd <multipass>
git submodule update --init --recursive
mkdir build
cd build
cmake ../
make
sudo <multipass>/build/bin/multipassd &
<multipass>/build/bin/multipass launch --name foo
<multipass>/build/bin/multipass shell foo