Shulou(Shulou.com)06/01 Report--

MongoDB installation and configuration

The first step is to download the mongoDB database from mongoDB's official website.

Download the version according to your operating system.

MongoDB such as: mongodb-linux-x86_64-3.2.10.tgz

Step 2, install the virtual machine

Skip installation of virtual machine

Step 3: install the linux system

Linux installation skipped

Step 4: install the SSH connection linx tool

Skip

Step 5, after the linx system is installed, log in to linx according to your user password

Use the SSH tool to connect to the linx

You can find the above on your own Baidu.

Step six, here comes the practical information.

Install mongoDB under linux

Decompress mongoDB

Change the folder name: mongodb

The file structure is as follows:

Mongodb

-> bin

-> GNU-AGPL-3.0

-> MPL-2

-> README

-> THIRD-PARTY-NOTICES

Create two folders in this folder to store data files and log files (of course, you can also choose your favorite location)

The folder name is: db

Log

Enter command: cd / usr/local/

Copy and paste the previous mongodb into this directory

Enter command: cd / usr/local/mongodb/bin

/ * * start the service * /

/ mongod-- dbpath=/usr/local/mongodb/db/-- logpath=/usr/local/mongodb/log/mongo.log-- logappend-- auth-- port=27017-- fork

/ * * success message * * /

About to fork child process, waiting until server is ready for connections.

Forked process: 12999

Child process started successfully, parent exiting

Finally, it started successfully.

. / mongod

Use admin

/ * * create a Super Admin. Versions later than mongoDB 3.0 are suitable for create creation, not add * * /

Db.createUser ({user: "super", pwd: "super", roles: [{role: "root", db: "admin"}]})

Db.auth ("super", "super")

/ * * create database * * /

Use mydb

Add data

Db.usr.insert ({'name':'tompig'})

/ * * above is only the account in which the admin database is created, and the newly created database cannot be accessed yet * /

Log in to create using your super account

. / mongo

Use admin

Db.auth ("super", "super")

Use mydb

Db.createUser ({user: "testx", pwd: "testx", roles: [{role: "dbAdmin", db: "mydb"}]})

After the creation is successful, access the data using the testx user connection.

/ * * disable the service * * /

1. General commands:

$. / mongo

> use admin

> db.shutdownServer ()

Note: the firewall must be turned off, otherwise you will not be able to access

/ * * turn off the firewall * /

Service iptables stop

/ * * permanently turn off the firewall * /

Chkconfig-level 35 iptables off

Encounter the following

Error report:

Permission denied.

Enter command: chmod-R 777 / usr/local/mongodb (the path here is the path of mongodb) reason = first see if it is root permission, and it is copied and pasted by ssh, and there is no permission.

Error report:

. / mongod: / usr/lib64/libcrypto.so.10: no version information available (required by. / mongod)

. / mongod: / usr/lib64/libssl.so.10: no version information available (required by. / mongod)

. / mongod: relocation error:. / mongod: symbol TLSv1_2_client_method, version libssl.so.10 not defined in file libssl.so.10 with link time reference

Input command: yum install-y openssl-devel openssl solution, installation of openssl dependent operation is required

Error report:

About to fork child process, waiting until server is ready for connections.

Forked process: 12981

ERROR: child process failed, exited with error number 1

Enter the command:. / mongod-- repair-- dbpath / usr/local/mongodb/db/-- repairpath / tmp/mongodb

How troublesome it is to set up the above settings. Configure the shortcut startup method below.

Create a new notepad, change the name to mongo.conf, and copy and paste the following

Dbpath=/usr/local/mongodb/db

Logpath=/usr/local/mongodb/log/mongo.log

Port=27017

Fork=true

Auth=true

Bind_ip=0.0.0.0

I believe you can understand the configuration above.

The database storage path of dbpath=mongodb

Log file storage path of logpath=mongodb

Port= port number

Fork=true this is run as a daemon

Does auth=true require authentication and login?

Bind_ip= binding port number. 0.0.0.0 means that any ip can access it. Otherwise, you need to specify an ip such as 192.168.1.102.

Once configured, put this file in the / usr/mongodb/bin directory

Enter the command: cd / usr/local/mongodb/bin enter the directory

Enter the command:. / mongod-f mongo.conf to start

Over, here is the help of db

Help from db

Db.createUser (username,password) add user

Db.auth (usrename,password) sets up database connection verification

Db.cloneDataBase (fromhost) Clones a database from the target server

Db.commandHelp (name) returns the help for the command

Db.copyDatabase (fromdb,todb,fromhost) replication database fromdb--- source database name, todb--- target database name, fromhost--- source database server address

Db.createCollection (name, {size:3333,capped:333,max:88888}) creates a dataset, which is equivalent to a table

Db.currentOp () cancels the current operation of the current library

Db.dropDataBase () deletes the current database

Db.eval (func,args) run code server-side

Db.getCollection (cname) gets a collection of data. Synonym: db ['cname'] or

Db.getCollenctionNames () gets a list of the names of all data sets

Db.getLastError () returns the last error message

Db.getLastErrorObj () returns the last wrong object

Db.getMongo () gets the connection object get the server of the current server

Db.getMondo (). SetSlaveOk () allow this connection to read from then nonmaster membr of a replica pair

Db.getName () returns the name of the database to be operated on

Db.getPrevError () returns the last error object

Db.getProfilingLevel () gets profile level

Db.getReplicationInfo () gets duplicate data

Db.getSisterDB (name) get the db at the same server as this onew

Db.killOp () stops (kills) the current operation in the current library

Db.printCollectionStats () returns the dataset status of the current library

Db.printReplicationInfo () prints the replication status information of the master database

Db.printSlaveReplicationInfo () prints replication status information from the database

Db.printShardingStatus () returns whether the current database is a shared database

Db.removeUser (username) Delete user

Db.repairDatabase () repairs the current database

Db.resetError ()

Db.runCommand (cmdObj) run a database command. If cmdObj is a string, turns it into {cmdObj:1}

Db.setProfilingLevel (level) sets profile level 0 to offline 1 to record 2 to all

Db.shutdownServer () closes the current service program

Db.version () returns the version information of the current program

Read: allows the user to read the specified database readWrite: allows the user to read and write the specified database dbAdmin: allows the user to perform management functions in the specified database, such as index creation, deletion, viewing statistics or accessing system.profileuserAdmin: allows the user to write to the system.users collection, and can find the specified database to create, delete and manage the user clusterAdmin: available only in the admin database, giving the user administrative rights to all shard and replication set related functions. ReadAnyDatabase: available only in admin databases, giving users read permissions to all databases readWriteAnyDatabase: available only in admin databases, giving users read and write permissions to all databases userAdminAnyDatabase: available only in admin databases, giving users userAdmin permissions to all databases dbAdminAnyDatabase: available only in admin databases, giving users dbAdmin permissions to all databases. Root: available only in the admin database. Super account, super privilege

Table help, format, db. Table name .help ()

Db.test.find ({id:10}) returns the dataset of the test dataset ID=10

Db.test.find ({id:10}) .count () returns the total number of data from the test dataset ID=10

Db.test.find ({id:10}) .limit (2) returns the dataset of the test dataset ID=10 the dataset starting from Article 2

Db.test.find ({id:10}) .skip (8) returns the dataset of the test dataset ID=10 from 0 to 8

Db.test.find ({id:10}) .limit (2) .skip (8) returns data from articles 2 to 8 of the dataset of the test dataset ID=1=

Db.test.find ({id:10}) .sort () returns the sorted dataset of the test dataset ID=10

Db.test.findOne ([query]) returns a piece of data that meets the criteria

Db.test.getDB () returns the name of the database to which this dataset belongs

Db.test.getIndexes () returns the index information of some datasets

Db.test.group ({key:...,initial:...,reduce:... [, cond:...]}) returns grouping information

Db.test.mapReduce (mayFunction,reduceFunction,) this is a bit like a stored procedure.

Db.test.remove (query) deletes a piece of data in the dataset

Db.test.renameCollection (newName) renames some dataset names

Db.test.save (obj) inserts a piece of data into the dataset

Db.test.stats () returns the status of this dataset

Db.test.storageSize () returns the storage size of this dataset

Db.test.totalIndexSize () returns the index file size for this dataset

Db.test.totalSize () returns the total size of some datasets

Db.test.update (query,object [, upsert_bool]) updates a piece of data in this dataset

Db.test.validate () validates this dataset

Db.test.getShardVersion () returns the dataset shared version number

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