MongoDB 2.6 does not start on Ubuntu 15.04

MongoDB 2.6 does not start on Ubuntu 15.04

  17:06    nampanasonic

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I installed from the debian wheeze repository and it works fine.
First make sure you remove the mongodb-org package and all its dependencies:

sudo apt-get purge mongodb-org
sudo apt-get autoremove

Remove the old mongodb.list you created:

sudo rm /etc/apt/sources.list.d/mongodb.list

Use the Debian repository instead:

echo "deb http://repo.mongodb.org/apt/debian wheezy/mongodb-org/3.0 main" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.0.list

Update and install again:

sudo apt-get update
sudo apt-get install -y mongodb-org

After that, you can succesffully start the server:

sudo service mongod start

or

systemctl start mongod

(as clarified by Ernie Hershey in reply to Roman Gaufman's comment here: https://jira.mongodb.org/browse/SERVER-17742)