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