1. 下载mongodb源码，并解压：

   wget https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-ubuntu1604-4.0.11.tgz
   
   tar -zxvf mongodb-linux-x86_64-ubuntu1604-4.0.11.tgz

2. 创建mongo专属目录，拷贝bin下文件到mongodb目录下bin中：

   mkdir /usr/local/mongodb
   
   cd /usr/local/mongodb
   
   mkdir bin
   
   cp .../mongodb-linux-x86_64-ubuntu1604-4.0.11/bin/* ./bin/

3. 创建数据库文件目录、日志目录、配置文件：

   mkdir data
   
   touch mongodb.log
   
   touch mongodb.conf

4. 配置文件内容：

   dbpath=/usr/local/mongodb/data
   logpath=/usr/local/mongodb/mongodb.log
   
   logappend=true
   journal=true
   fork=true
   
   bind_ip = 127.0.0.1
   port = 27017
   
   noauth = true
   #auth = true

5. 将mongo添加path：

   #打开profile
   vi /etc/profile
   
   #输入下面内容：
   MONGO_DB="/usr/local/mongodb"
   PATH=$MONGO_DB/bin:$PATH:
   export PATH
   
   #加载配置
   source /etc/profile

6. 启动mongodb：

   /usr/local/mongodb/bin/mongod --config /usr/local/mongodb/mongodb.conf

   #启动后会看到：
   
   about to fork child process, waiting until server is ready for connections.
   forked process: 1361
   child process started successfully, parent exiting