服务器是阿里云64位的centos7,我的安装步骤是这样的
修改yum包管理系统
vim /etc/yum.repos.d/mongodb-org-3.2.repo
填写配置
[mongodb-org-3.2]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/3.2/x86_64/gpg
check=0
enabled=1
yum安装
yum install -y mongodb-org
错误提示，看英文是连接超时没有其它镜像了的样子，我要怎么配置其它镜像呢？或者直接修改baseurl ? 
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Can’t you just download and compile it yourself? Or you can use a proxy to connect to high-speed foreign websites.
I also encountered it, but I was using fedora. After checking the official documentation, I found that fedora does not support versions above 3.0. In the end, I used 2.6. You can open https://repo.mongodb.org/yum/redhat/7/mongodb-org/3.2/x86_64/gpgrepodata/repomd.xml to see if the key was not added successfully. The official configuration file is
[mongodb-org-3.2]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/3.2/x86_64/
gpgcheck=1
enabled=1