Mongodb installation & userguide

1.Mongodb Installation in Ubuntu

(1) Download from: https://www.mongodb.org/downloads

File: mongodb-linux-x86_64-ubuntu1404-3.0.6.tgz

(2) Decompressing files.

　　tar zxf mongodb-linux-x86_64-ubuntu1404-3.0.6.tgz

　　mv mongodb-linux-x86_64-ubuntu1404-3.0.6 /usr/local/mongodb

(3) Create default directories for mongdb data files.

mkdir data

cd data

mkdir db

(4) Create default logs file.

　　touch logs

(5) Run mongod.

--fork                      fork server process

--dbpath arg 　　　　directory for datafiles - defaults to /data/db

　　--logpath arg 　　　　log file to send write to instead of stdout - has to be a file, not directory

　　--httpinterface          enable http interface

　　cd bin

　　./mongod --dbpath=/usr/local/mongodb/mongodb/data/db --fork --httpinterface --logpath=/usr/local/mongodb/mongodb/logs

(6) Check mongod process.

　　ps -ef | grep mongo

(7) Check mongodb information.

　　http://192.168.98.70:28017/

(8) Enter mongo shell.

　　cd bin　

　　./mongo

MongoDB shell version: 3.0.6

connecting to: test

Welcome to the MongoDB shell.

For interactive help, type "help".

2.Use Mongodb.

show dbs　　　　　　show database names

show collections 　　 show collections in current database

show users 　　　　  show users in current database

show profile 　　　　 show most recent system.profile entries with time >= 1ms

show logs 　　　　　 show the accessible logger names

show log [name] 　　prints out the last segment of log in memory, 'global' is default

use <db_name> 　　set current database

db.foo.find()　　　　  list objects in collection foo

db.foo.find( { a : 1 } ) 　　　　   list objects in foo where a == 1

it 　　　　　　　　　　　　  　　　result of the last line evaluated; use to further iterate

DBQuery.shellBatchSize = x 　　 set default number of items to display on shell

exit 　　　　　　　　　　　　　　  quit the mongo shell

3.CRUD.

　　db.foo.insert({name:'edison',age:28})

　　db.foo.insert({name:'scofield',age:30})

　　db.foo.find()

　　db.foo.find({name:'edison'})

　　db.foo.update({name:'edison'},{name:'edison',age:40})

　　db.foo.remove({age:40})