windows安装
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每次运行mongod --dbpath D:/MongoDB/data 命令行来启动MongoDB实在是不方便，把它作为Windows服务，这样就方便多了。
D:MongoDBin>mongod --logpath D:MongoDBlogsMongoDB.log --logappend --dbpath D:MongoDBdata --directoryperdb --serviceName MongoDB --install
all output going to: D:MongoDBlogsMongoDB.log
Creating service MongoDB.
Service creation successful.
Service can be started from the command line via 'net start "MongoDB"'.
强调1：log一定要指定一个xxx.log文件(文件不存在也要这么写，会自动创建，写成这样是不可以的--logpath d:mongodblogs)
2:注意：logs文件夹和data文件夹要先新建好；serviceName的N字母要大写
该命令行指定了日志文件：D:MongoDBlogsMongoDB.log，日志是以追加的方式输出的；
数据文件目录：D:MongoDBdata，并且参数--directoryperdb说明每个DB都会新建一个目录；
Windows服务的名称：MongoDB；
以上的三个参数都是可以根据自己的情况而定的，呵呵。
最后是安装参数：--install，与之相对的是--remove
启动MongoDB：net start MongoDB
停止MongoDB：net stop MongoDB
（突然停电等情况容易造成Mongo服务出错，可以先删除data目录下的log和lock文件然后重新启动服务）
Linux安装
1. Configure the package management system (YUM)
Create a /etc/yum.repos.d/mongodb.repo file to hold the following configuration information for the MongoDB repository:
If you are running a 64-bit system, use the following configuration:
[mongodb]
name=MongoDB Repository
baseurl=http://downloads-distro.mongodb.org/repo/redhat/os/x86_64/
gpgcheck=0
enabled=1
If you are running a 32-bit system, which is not recommended for production deployments, use the following configuration:
[mongodb]
name=MongoDB Repository
baseurl=http://downloads-distro.mongodb.org/repo/redhat/os/i686/
gpgcheck=0
enabled=1
2. Install the MongoDB packages and associated tools.
To install the latest stable version of MongoDB, issue the following command:
sudo yum install -y mongodb-org
3. Start MongoDB
sudo service mongod start
You can optionally ensure that MongoDB will start following a system reboot by issuing the following command:
sudo chkconfig mongod on
4. Stop MongoDB
sudo service mongod stop
5. Restart MongoDB
sudo service mongod restart
6.modify /etc/mongo.conf
change
bind_ip=127.0.0.1
to
bind_ip=0.0.0.0