setup mongodb on ubuntu 15.04

setup

systemd to upstart-sysv

     # ubuntu 15.04 advanced the default init system
     # from `upstart` to systemd

     # switch back to `upstart`
     $ sudo apt-get install upstart-sysv
     $ sudo reboot

install

     # 1. import public key
     $ sudo apt-key adv --keyserver keyserver.ubuntu.com --recv 7F0CEB10
     # 2. create a list file for mongodb
     $ sudo echo "deb http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/3.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.0.list
     # 3. reload local package database
     $ sudo apt-get update
     # 4. install
     sudo('apt-get install -y mongodb-org')

service
```
     $ sudo service mongod start
```

uninstall

     # 1. stop mongodb
     $ sudo service mongod stop
     # 2. remove package
     $ sudo apt-get purge mongodb-org*
     # 3. remove data directories
     $ sudo rm -r /var/log/mongodb
     $ sudo rm -r /var/lib/mongodb

references

support for ubuntu 15.04
install mongodb on ubuntu