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.

Answer 2

First start your mongo server by

Users-MacBook-Pro:csv1 Admin$ mongod
all output going to: /usr/local/var/log/mongodb/mongo.log

Then open another terminal window and open shell

Users-MacBook-Pro:csv1 Admin$ mongo

Answer 3

I solved this problem on ubuntu 12.04 by following steps:
1) sudo rm /var/log/mongodb
2) sudo rm /var/lib/mongodb
3) I removed mongo and then installed it again
4) sudo service mongodb restart

and All is Well

Answer 4

You need to delete the lockfile mongod.lock or /var/lib/mongodb/mongod.lock on ubuntu, then you need to run mongod.exe or service mongodb start on ubuntu first, then run mongo.exe or mongo on ubuntu.

Answer 5

Either your mongod is not running (check using "ps" command) or it is listening on some outside IP address and not on localhost. So first check the process list if 'mongod' is running. If yes, check with "netstat -nap" for the related port.

Of course you can start mongod on the console manually or even look into the mongod logfile (if there is one configured...depending on how you installed mongod).

Answer 6

Also check that your root partition has enough space to start mongod.

df -h /

You'll see smth like this on mongod launch:

Mon Aug 12 17:02:59.159 [initandlisten] recover : no journal files present, no recovery needed
Mon Aug 12 17:02:59.159 [initandlisten] 
Mon Aug 12 17:02:59.159 [initandlisten] ERROR: Insufficient free space for journal files
Mon Aug 12 17:02:59.159 [initandlisten] Please make at least 3379MB available in /var/lib/mongodb/journal or use --smallfiles
Mon Aug 12 17:02:59.159 [initandlisten] 
Mon Aug 12 17:02:59.159 [initandlisten] exception in initAndListen: 15926 Insufficient free space for journals, terminating
Mon Aug 12 17:02:59.159 dbexit: 
Mon Aug 12 17:02:59.159 [initandlisten] shutdown: going to close listening sockets...