安装MongoDB的方法有很多种，可以源代码安装，在Centos也可以用yum源安装的方法。由于MongoDB更新得比较快，我比较喜欢用yum源安装的方法。64位Centos下的安装步骤如下：
1、准备工作
运行yum命令查看MongoDB的包信息 [root@localhost~]# yum info mongo-10gen
（提示没有相关匹配的信息，） 说明你的centos系统中的yum源不包含MongoDB的相关资源，所以要在使用yum命令安装MongoDB前需要增加yum源，也就是在 /etc/yum.repos.d/目录中增加 *.repo yum源配置文件
2、vi /etc/yum.repos.d/10gen.repo，输入下面的语句：
[10gen]
name=10gen Repository
baseurl=http://downloads-distro.mongodb.org/repo/redhat/os/x86_64
gpgcheck=0
做好yum源的配置后，如果配置正确执行下面的命令便可以查询MongoDB相关的信息：
查看mongoDB的服务器包的信息
[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.
查看客户端安装情况
[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,
: replication 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、安装MongoDB的服务器端和客户端工具
[root@localhost geffzhang]# yum install mongo-10gen-server
[root@localhost geffzhang]# yum install mongo-10gen
4、启动Mongodb
service mongod start
以后有更新了，停掉mongodb，执行yum update mongo-10gen mongo-10gen-server 即可。
5、服务器配置: /etc/mongod.conf
1. # mongo.conf
2.
3. #where to log
4. logpath=/var/log/mongo/mongod.log
5.
6. logappend=true #以追加方式写入日志
7.
8. # fork and run in background
9. fork = true
10.
11. #port = 27017 #端口
12.
13. dbpath=/var/lib/mongo #数据库文件保存位置
14. directoryperdb=true
15. # Enables periodic logging of CPU utilization and I/O wait
16. #启用定期记录CPU利用率和 I/O 等待
17. #cpu = true
18.
19. # Turn on/off security. Off is currently the default
20. # 是否以安全认证方式运行，默认是不认证的非安全方式
21. #noauth = true
22. #auth = true
23.
24. # Verbose logging output.
25. # 详细记录输出
26. #verbose = true
27.
28. # Inspect all client data for validity on receipt (useful for
29. # developing drivers)用于开发驱动程序时的检查客户端接收数据的有效性
30. #objcheck = true
31.
32. # 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
33. #quota = true
34. # 设置oplog记录等级
35. # Set oplogging level where n is
36. # 0=off (default)
37. # 1=W
38. # 2=R
39. # 3=both
40. # 7=W+some reads
41. #oplog = 0
42.
43. # Diagnostic/debugging option 动态调试项
44. #nocursors = true
45.
46. # Ignore query hints 忽略查询提示
47. #nohints = true
48. # 禁用http界面，默认为localhost：28017
49. # Disable the HTTP interface (Defaults to localhost:27018).这个端口号写的是错的
50. #nohttpinterface = true
51.
52. # 关闭服务器端脚本，这将极大的限制功能
53. # Turns off server-side scripting. This will result in greatly limited
54. # functionality
55. #noscripting = true
56. # 关闭扫描表，任何查询将会是扫描失败
57. # Turns off table scans. Any query that would do a table scan fails.
58. #notablescan = true
59. # 关闭数据文件预分配
60. # Disable data file preallocation.
61. #noprealloc = true
62. # 为新数据库指定.ns文件的大小，单位:MB
63. # Specify .ns file size for new databases.
64. # nssize = <size>
65.
66. # Accout token for Mongo monitoring server.
67. #mms-token = <token>
68. # mongo监控服务器的名称
69. # Server name for Mongo monitoring server.
70. #mms-name = <server-name>
71. # mongo监控服务器的ping 间隔
72. # Ping interval for Mongo monitoring server.
73. #mms-interval = <seconds>
74.
75. # Replication Options 复制选项
76.
77. # in replicated mongo databases, specify here whether this is a slave or master 在复制中，指定当前是从属关系
78. #slave = true
79. #source = master.example.com
80. # Slave only: specify a single database to replicate
81. #only = master.example.com
82. # or
83. #master = true
84. #source = slave.example.com
