1. key

1) Online way

apt-key adv --keyserver "hkps.pool.sks-keyservers.net" --recv-keys "0x6B73A36E6026DFCA"

wget https://packages.erlang-solutions.com/erlang-solutions_1.0_all.deb
sudo dpkg -i erlang-solutions_1.0_all.deb

sudo apt-get update
sudo apt-get install erlang-nox

如果不设定此步，则系统默认使用Ubuntu更新服务器上的RabbitMQ(v3.5.7)

Ubuntu 16.04:

echo "deb https://dl.bintray.com/rabbitmq/debian xenial main" | sudo tee /etc/apt/sources.list.d/bintray.rabbitmq.list

Ubuntu 18.04:

echo "deb https://dl.bintray.com/rabbitmq/debian bionic main" | sudo tee /etc/apt/sources.list.d/bintray.rabbitmq.list

sudo apt-get update
sudo apt-get install rabbitmq-server

Reference: