MongoDB official site has detail install instruction. but there's some difference to follow on Raspberry Pi. Raspberry Pi is based on Debian. so I go with Debian Instruction basically. https://docs.mongodb.com/master/tutorial/install-mongodb-on-debian/#import-the-public-key-used-by-the-package-management-system see briefly 1. Importing the Public Key sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv EA312927 2. Creating a List File echo "deb http://repo.mongodb.org/apt/debian wheezy/mongodb-org/3.2 main" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.2.list and if you need do sudo apt-get update 3. Installing and Verifying MongoDB sudo apt-get install -y mongodb 4. Run if use wheezy version Raspbian sudo service mongod start if usejessie version Raspbian sudo systemctl start mongodb