Install mongodb on ubuntu without using apt-key

install-mongo.sh

#!/bin/sh

# https://askubuntu.com/questions/1286545/
# https://www.mongodb.com/docs/v4.4/tutorial/install-mongodb-on-ubuntu/

version='4.2'
gpg_file="mongodb-${version}.gpg"

wget "https://www.mongodb.org/static/pgp/server-${version}.asc"
gpg --no-default-keyring --keyring ./temp-keyring.gpg --import "server-${version}.asc"
gpg --no-default-keyring --keyring ./temp-keyring.gpg --export --output "${gpg_file}"
rm temp-keyring.*
rm "server-${version}.asc"
sudo chown root:root "${gpg_file}"
sudo mv "${gpg_file}" /etc/apt/keyrings/
echo "deb [arch=amd64,arm64 signed-by=/etc/apt/keyrings/${gpg_file}] https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/${version} multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-${version}.list
sudo apt-get update
sudo apt-get install -y mongodb-org