1. vi /etc/hosts
192.168.0.71 hadoop-master
192.168.0.72 hadoop-slave1
192.168.0.73 hadoop-slave2
2. set ssh connect no need password(master and salve)
ssh-keygen -t rsa
cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
3. set env virables
vi /etc/profile
export HADOOP_HOME=/usr/local/hadoop
export PATH=$PATH:$HADOOP_HOME/bin
source /etc/profile
3. edit config files
http://www.ityouknow.com/hadoop/2017/07/24/hadoop-cluster-setup.html