[root@localhost~]# yum info mongodb-org
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Installed Packages
Name        : mongodb-org
Arch        : x86_64
Version     : 3.4.10
Release     : 1.el6
Size        : 0.0  
Repo        : installed
From repo   : mongodb-org-3.4
Summary     : MongoDB open source document-oriented database system (metapackage)
URL         : http://www.mongodb.org
License     : AGPL 3.0
Description : MongoDB is built for scalability, performance and high availability, scaling from single server deployments to large, complex multi-site architectures. By leveraging in-memory
            : computing, MongoDB provides high performance for both reads and writes. MongoDB’s native replication and automated failover enable enterprise-grade reliability and operational
            : flexibility.
            : 
            : MongoDB is an open-source database used by companies of all sizes, across all industries and for a wide variety of applications. It is an agile database that allows schemas to
            : change quickly as applications evolve, while still providing the functionality developers expect from traditional databases, such as secondary indexes, a full query language
            : and strict consistency.
            : 
            : MongoDB has a rich client ecosystem including hadoop integration, officially supported drivers for 10 programming languages and environments, as well as 40 drivers supported
            : by the user community.
            : 
            : MongoDB features:
            : * JSON Data Model with Dynamic Schemas
            : * Auto-Sharding for Horizontal Scalability
            : * Built-In Replication for High Availability
            : * Rich Secondary Indexes, including geospatial
            : * TTL indexes
            : * Text Search
            : * Aggregation Framework & Native MapReduce
            : 
            : This metapackage will install the mongo shell, import/export tools, other client utilities, server software, default configuration, and init.d scripts.

vim /etc/yum.repos.d/mongodb-3.4.repo

[mongodb-org-3.4]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/3.4/x86_64/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-3.2.asc

yum install -y mongodb-org

service mongod start

# mongod.conf

#where to log
logpath=/data/logs/mongodb/mongod.log

logappend=true #以追加方式写入日志

# fork and run in background
fork=true

#port=27017

dbpath=/data/mongo  #数据库文件保存位置

# location of pidfile
pidfilepath=/var/run/mongodb/mongod.pid

# Listen to local interface only. Comment out to listen on all interfaces. 
bind_ip=10.81.85.229

# Disables write-ahead journaling
# nojournal=true

#启用定期记录CPU利用率和 I/O 等待   
# Enables periodic logging of CPU utilization and I/O wait
#cpu=true

# 是否以安全认证方式运行，默认是不认证的非安全方式   
# Turn on/off security.  Off is currently the default
#noauth=true
auth=true

# Verbose logging output.
#verbose=true

# Inspect all client data for validity on receipt (useful for
# developing drivers)
#objcheck=true

# Enable db quota management 启用数据库配额管理，默认每个db可以有8个文件，可以用quotaFiles参数设置   
#quota=true

# Set oplogging level where n is
#   0=off (default)
#   1=W
#   2=R
#   3=both
#   7=W+some reads
#diaglog=0

# Ignore query hints
#nohints=true

# Enable the HTTP interface (Defaults to port 28017).
#httpinterface=true

# Turns off server-side scripting.  This will result in greatly limited
# functionality
#noscripting=true

# Turns off table scans.  Any query that would do a table scan fails.
#notablescan=true

# Disable data file preallocation.
#noprealloc=true

# Specify .ns file size for new databases.
# nssize=<size>

# Replication Options

# in replicated mongo databases, specify the replica set name here
#replSet=setname
# maximum size in megabytes for replication operation log
#oplogSize=1024
# path to a key file storing authentication info for connections
# between replica set members
#keyFile=/path/to/keyfile

> use admin
> db.createUser({user:"root",pwd:"123456",roles:[{role:"root",db:"admin"}]})

mongo 127.0.0.1:27017/admin -u root -p