Downloading and installing
Arch Linux -
There are two important points, only partly specified so far on bisq downloads site:
1 (specified already) AUR is the Arch User Repository where the community has package details for Bisq (https://aur.archlinux.org/packages/bisq/)
2 (not specified, but important for unfamiliar Arch users) From the command line, you first clone the repo from AUR, then from the cloned directory use `makepkg -si`. That will read the PKGBUILD file from and get, verify, build, and install the various tools necessary to install Bisq.
You will then have Bisq!