How do I restart mongodb?

I installed mongoldb using the one-click installer. I changed the config bind-ip and commented it out (to allow it to accept any connection). Then I wanted to restart to make the changes take effect, so I did the following:

root@mongo:~# mongo
MongoDB shell version: 3.0.0
connecting to: test
> use admin
switched to db admin
> db.shutdownServer();

Then I expected it to try and reconnect, however this happened:

2015-04-05T11:36:13.492-0400 I NETWORK  DBClientCursor::init call() failed
server should be down...
2015-04-05T11:36:13.495-0400 I NETWORK  trying reconnect to 127.0.0.1:27017 (127.0.0.1) failed
2015-04-05T11:36:13.496-0400 W NETWORK  Failed to connect to 127.0.0.1:27017, reason: errno:111 Connection refused
2015-04-05T11:36:13.496-0400 I NETWORK  reconnect 127.0.0.1:27017 (127.0.0.1) failed failed couldn't connect to server 127.0.0.1:27017 (127.0.0.1), connection attempt failed

How can I restart my mongod process?