安装 MongoDB：
```bash
[root@localhost ~]$ cat /etc/yum.repos.d/mongodb-3.4.repo
[mongodb-org-3.4]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/3.4/x86_64/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-3.4.asc
```
```bash
[root@localhost ~]$ yum install -y mongodb-org
```
配置 MongoDB：
```bash
[root@localhost ~]$ cat /etc/mongod.conf
systemLog:
destination: file
logAppend: true
path: /var/log/mongodb/mongod.log # 日志存放目录
storage:
dbPath: /data/mongodb # 数据存放目录
journal:
enabled: true
processManagement:
fork: true
pidFilePath: /var/run/mongodb/mongod.pid # pid文件路径
net:
port: 27017 # 监听端口，默认是27017
bindIp: 127.0.0.1 # 定义可以远程连接MongoDB的IP地址
```
```bash
[root@localhost ~]$ mkdir -p /data/mongodb # 创建数据存放目录
```
启动并连接 MongoDB：
```bash
[root@localhost ~]$ systemctl start mongod # 启动 MongoDB
[root@localhost ~]$ mongo --host 127.0.0.1 --port 27017 # 连接 MongoDB
```