New to MongoDB Can not run command mongo

Solution 1:

After installing the MongoDB you should manually create a data folder.

By default MongoDB will store data in /data/db, 
but it won't automatically create that directory. To create it, do:

$ sudo mkdir -p /data/db/
$ sudo chown `id -u` /data/db

You can also tell MongoDB to use a different data directory,
with the --dbpath option.

For more detailed information go to MongoDB wiki page.

Solution 2:

I think your log output states it clearly;

exception in initAndListen: 10296 dbpath (/data/db) does not exist, terminating

You may simply create this directory or better to define it as a configuration value within your configuration file then use it as mongod -f C:\path\to\your\mongodb.conf.

Solution 3:

Specify the database path explicitly like so, and see if that resolves the issue.

mongod --dbpath data/db

Solution 4:

mongod --dbpath "c://data/db"

run the above code, this will start the server.

Solution 5:

For Windows 7

You may specify an alternate path for \data\db with the dbpath setting for mongod.exe,

as in the following example:

c:\mongodb\bin\mongod.exe --dbpath c:\mongodb\data\db

you can set dbpath through Configuration File.