For me, this did the trick: chown -R mongodb:mongodb /data Source: https://stackoverflow.com/questions/45691032/mongod-service-start-exits-with-code-100

For me this did the trick: chown mongodb:mongodb /tmp/mongodb-27017.sock More about this, in the link below. Source: https://askubuntu.com/questions/823288/mongodb-loads-but-breaks-returning-status-14