i have following step.
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv 7F0CEB10
sudo gedit /etc/apt/sources.list
deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen
sudo apt-get install mongodb-10gen
when i run command mongo --version result was MongoDB shell version: 2.4.9 then at command
sudo start mongodb
result
mongodb start/running, process 5808
at command
sudo stop mongodb
result was stop: Unknown instance: at command
mongo
result was .MongoDB shell version: 2.4.9 connecting to: test Sun Mar 2 18:57:50.050 Error: couldn't connect to server 127.0.0.1:27017 at src/mongo/shell/mongo.js:145 exception: connect failed again on command
sudo service mongodb restart
stop: Unknown instance: mongodb start/running, process 5873
mongo
MongoDB shell version: 2.4.9 connecting to: test Sun Mar 2 18:57:50.050 Error: couldn't connect to server 127.0.0.1:27017 at src/mongo/shell/mongo.js:145 exception: connect failed