Ubuntu/Debian:
$ sudo apt-get install -y curl dirmngr gpg
CentOS/Fedora/RHEL:
$ sudo yum install -y curl dirmngr gnupg
$ gpg --keyserver hkps://keys.openpgp.org --recv-keys 4ED778F539E3634C779C87C6D7062848A1AB005C
$ asdf plugin-add nodejs https://github.com/asdf-vm/asdf-nodejs.git
$ asdf install nodejs 8.16.0