Install MongoDB in Ubuntu and perform some simple action notes _mongodb

First install MongoDB, in the terminal input:

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sudo apt-get install MongoDB

then start the database MongoDB:

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Mongod

This error may occur:

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Mongod--help for help and startup options
Mongod:symbol lookup error:mongod:undefined Symbol: _zn7pcrecpp2re4initepkcpkns_10re_optionse

install Mongodb-10gen below to resolve this error:
Get download 10-gen public key:

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sudo apt-key adv--keyserver keyserver.ubuntu.com--recv 7F0CEB10

Create a/etc/apt/sources.list.d/10gen:

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Echo ' Deb Http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen ' | sudo tee/etc/apt/sources.list.d/10gen.list

Install Mongodb-10gen:

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sudo apt-get update and then sudo apt-get install Mongodb-10gen

If there is a conflict between the prompt and the remove mongodb-clients, you can uninstall the remove mongodb-clients Reinstall:

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sudo apt-get remove mongodb-clients
sudo apt-get install Mongodb-10gen

So in the execution of Mongod look at the effect.

Some simple things about MongoDB:
in the terminal input(Mongod must already be started):

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Mongo

The default connection to test.

To view an existing database:

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Show DBS

To delete a database:

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Use <-database->//<-database-> the name of the database to be deleted
Db.dropdatabase ()

To Create a database:

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Use <-database->//<-database-> is the name of the database to create and it automatically creates the database and connects to the database

Deposit Data:

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Use test
A = {"name": "Moneyinto"}
B = {"Age": "23"}
Db.test.insert (a)//a,b stored in different locations
Db.age,insert (b)

View data:

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Use test
Db.test.find ()
Db.age.find ()

to delete age from database test:

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Db.age.remove ()//delete
Db.age.find ()//check to see if deleted

Continue to accumulate, continue to update!