couldn't connect to server 127.0.0.1 shell/mongo.js

Question

when i setup mongodb in my ubuntu , i try : ./mongo it show this error :

 couldn\'t connect to server 127.0.0.1 shell/mongo.js

so what can

Answer 1

sudo rm /var/lib/mongodb/mongod.lock   
sudo -u mongodb mongod -f /etc/mongodb.conf --repair 
sudo service mongodb start

Here is all, sometimes, it takes a little while to start mongo after performing these operations.