1、建立用户

useradd -u 1000 hadoop
passwd hadoop		##密码设置为hadoop

2、安装配置

1）切换到hadoop用户
2）准备jdk包和hadoop包，如图

3）解压安装，并分别为java和hadoop做软连接

tar -zxvf jdk-8u181-linux-x64.tar.gz 
ln -s jdk1.8.0_181/ java
tar -zxvf hadoop-3.0.3-src.tar.gz
ln -s hadoop-3.0.3 hadoop

4）java配置环境变量

[hadoop@hadoop hadoop]$ pwd
/home/hadoop/hadoop/etc/hadoop

[hadoop@hadoop hadoop]$ vim hadoop-env.sh
export JAVA_HOME=/home/hadoop/java		
[hadoop@hadoop hadoop]$ cd 
[hadoop@hadoop ~]$ vim .bash_profile
PATH=$PATH:$HOME/.local/bin:$HOME/bin:$HOME/java/bin
[hadoop@hadoop ~]$ source .bash_profile			##生效