创建用户流程为：先在非安全模式下启动数据库，创建全局用户，再停止数据库，在安全模式下重新启动，然后用全局用户登录并进行管理。
1.创建用户
①.在非安全模式下启动数据库：
D:\mongodb\bin>mongod --dbpath d:\mongodb\db②.创建全局用户：
D:\mongodb\bin>mongo localhost/admin
MongoDB shell version: 2.0.6
connecting to: localhost/admin
> db.addUser("admin","666666")
{ "n" : 0, "connectionId" : 1, "err" : null, "ok" : 1 }
{
"user" : "admin",
"readOnly" : false,
"pwd" : "c5436ae68764137eb0a564620d299d0e",
"_id" : ObjectId("5059c7c9efafcf4143548dbb")
}
> use test
switched to db test
> db.addUser("testadmin","666666")
{ "n" : 0, "connectionId" : 1, "err" : null, "ok" : 1 }
{
"user" : "testadmin",
"readOnly" : false,
"pwd" : "6a9f75616b386f43421b1d53e01c1cd1",
"_id" : ObjectId("5059c7f3efafcf4143548dbc")
}
> db.addUser("testuser","666666",true)
{ "n" : 0, "connectionId" : 1, "err" : null, "ok" : 1 }
{
"user" : "testuser",
"readOnly" : true,
"pwd" : "ac9ffa0bb70668810023330e4d3324ec",
"_id" : ObjectId("5059c80aefafcf4143548dbd")
}
>说明：testadmin和testuser用户等全局用户登录后再创建也是可以的，注意testuser只有只读权限。
2.用户登录
①.在安全模式下启动数据库：
D:\mongodb\bin>mongod [color=Red]--auth[/color] --dbpath d:\mongodb\db②.测试是否开启安全模式：
D:\mongodb\bin>mongo
MongoDB shell version: 2.0.6
connecting to: test
> show collections
Wed Sep 19 21:31:53 uncaught exception: error: {
"$err" : "unauthorized db:test lock type:-1 client:127.0.0.1",
"code" : 10057
}
>③.全局用户登录：
D:\mongodb\bin>mongo
MongoDB shell version: 2.0.6
connecting to: test
> db.auth("admin","666666")
0
> use admin
switched to db admin
> db.auth("admin","666666")
1
> use test
switched to db test
> show collections
system.indexes
system.users
>注意：全局用户必须在admin库中才可以验证
④.库用户登录：
D:\mongodb\bin>mongo
MongoDB shell version: 2.0.6
connecting to: test
> db.auth("testadmin","666666")
1
> show collections
system.indexes
system.users
>3.修改用户密码
> db.addUser("admin","777777")4.删除用户
> db.removeUser("testuser")参考资料
[1].Security and Authentication：http://www.mongodb.org/display/DOCS/Security+and+Authentication
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