If there is a problem with the system yum source, you can change the yum source
Configure Alibaba Cloud’s yum source
1) Download the repo file
wget http://mirrors.aliyun.com/repo/Centos -7.repo
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Tag: Ali
Hadoop (1) Ali Cloud Hadoop Cluster Configuration
Three ECS cloud servers
1.1 Create /bigdata directory
mkdir /bigdata
cd /bigdata
mkdir /app 1.2 Modify the host name node01, node02, node03
1.3 Modify the hosts file
vim /e