安裝MongoDB的方法有很多種，可以源代碼安裝，在CentOS也可以用yum源安裝的方法。由於MongoDB更新得比較快，我比較喜歡用yum源安裝的方法。64位Centos下的安裝步驟如下：
1、准備工作
運行yum命令查看MongoDB的包信息 [root@localhost~]# yum info mongo-10gen
（提示沒有相關匹配的信息，） 說明你的centos系統中的yum源不包含MongoDB的相關資源，所以要在使用yum命令安裝MongoDB前需要增加yum源，也就是在 /etc/yum.repos.d/目錄中增加 *.repo yum源配置文件
2、vi /etc/yum.repos.d/10gen.repo，輸入下面的語句：
[10gen]
name=10gen Repository
baseurl=http://downloads-distro.mongodb.org/repo/redhat/os/x86_64
gpgcheck=0
做好yum源的配置後，如果配置正確執行下面的命令便可以查詢MongoDB相關的信息：
查看mongoDB的服務器包的信息
[root@localhost geffzhang]# yum info mongo-10gen-server
* base: centos.ustc.edu.cn
* extras: centos.ustc.edu.cn
* updates: centos.ustc.edu.cn
Installed Packages
Name : mongo-10gen-server
Arch : x86_64
Version : 2.0.6
Release : mongodb_1
Size : 13 M
Repo : installed
From repo : 10gen
Summary : mongo server, sharding server, and support scripts
URL : http://www.mongodb.org
License : AGPL 3.0
Description : Mongo (from “huMONGOus”) is a schema-free document-oriented
: database.
:
: This package provides the mongo server software, mongo sharding
: server softwware, default configuration
files, and init.d scripts.
查看客戶端安裝情況
[root@localhost geffzhang]#
* base: centos.ustc.edu.cn
* extras: centos.ustc.edu.cn
* updates: centos.ustc.edu.cn
Installed Packages
Name : mongo-10gen
Arch : x86_64
Version : 2.0.6
Release : mongodb_1
Size : 69 M
Repo : installed
From repo : 10gen
Summary : mongo client shell and tools
URL : http://www.mongodb.org
License : AGPL 3.0
Description : Mongo (from “huMONGOus”) is a schema-free document-oriented
: database. It features dynamic profileable queries, full indexing,
: repli
cation and fail-over support, efficient storage of large
: binary data objects, and auto-sharding.
:
: This package provides the mongo shell, import/export tools, and
: other client utilities.
3、安裝MongoDB的服務器端和客戶端工具
[root@localhost geffzhang]# yum install mongo-10gen-server
[root@localhost geffzhang]# yum install mongo-10gen
4、啟動Mongodb
service mongod start
以後有更新了，停掉mongodb，執行yum update mongo-10gen mongo-10gen-server 即可。
5、服務器配置: /etc/mongod.conf
# mongo.conf
#where to log
logpath=/var/log/mongo/mongod.log
logappend=true #以追加方式寫入日志
# fork and run in background
fork = true
#port = 27017 #端口
dbpath=/var/lib/mongo #數據庫文件保存位置
directoryperdb=true
# Enables periodic logging of CPU utilization and I/O wait
#啟用定期記錄CPU利用率和 I/O 等待
#cpu = true
# Turn on/off security. Off is currently the default
# 是否以安全認證方式運行，默認是不認證的非安全方式
#noauth = true
#auth = true
# Verbose logging output.
# 詳細記錄輸出
#verbose = true
# Inspect all client data for validity on receipt (useful for
# developing drivers)用於開發驅動程序時的檢查客戶端接收數據的有效性
#objcheck = true
# Enable db quota management 啟用數據庫配額管理，默認每個db可以有8個文件，可以用quotaFiles參數設置
#quota = true
# 設置oplog記錄等級
# Set oplogging level where n is
# 0=off (default)
# 1=W
# 2=R
# 3=both
# 7=W+some reads
#oplog = 0
# Diagnostic/debugging option 動態調試項
#nocursors = true
# Ignore query hints 忽略查詢提示
#nohints = true
# 禁用http界面，默認為localhost：28017
# Disable the HTTP interface (Defaults to localhost:27018).這個端口號寫的是錯的
#nohttpinterface = true
# 關閉服務器端腳本，這將極大的限制功能
# Turns off server-side scripting. This will result in greatly limited
# functionality
#noscripting = true
# 關閉掃描表，任何查詢將會是掃描失敗
# Turns off table scans. Any query that would do a table scan fails.
#notablescan = true
# 關閉數據文件預分配
# Disable data file preallocation.
#noprealloc = true
# 為新數據庫指定.ns文件的大小，單位:MB
# Specify .ns file size for new databases.
# nssize = ;size;
# Accout token for Mongo monitoring server.
#mms-token = ;token;
# mongo監控服務器的名稱
# Server name for Mongo monitoring server.
#mms-name = ;server-name;
# mongo監控服務器的ping 間隔
# Ping interval for Mongo monitoring server.
#mms-interval = ;seconds;
# Replication Options 復制選項
# in replicated mongo databases, specify here whether this is a slave or master 在復制中，指定當前是從屬關系
#slave = true
#source = master.example.com
# Slave only: specify a single database to replicate
#only = master.example.com
# or
#master = true
#source = slave.example.com
