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})