基于Centos7安装Hadoop

基于Centos7安装Hadoop3.3.5

安装依赖

yum update -y
yum -y install gcc automake autoconf libtool make
yum -y install net-tools vim wget lrzsz

1 删除已有的jdk安装包，安装JDK1.8

# 查询当前本机可安装的所有JDK的版本
yum -y list java*

yum install java-1.8.0-openjdk -y
yum install java-1.8.0-openjdk-devel.x86_64 -y

# 检查是否安装成功
[root@cs ~]# java -version
openjdk version "1.8.0_402"
OpenJDK Runtime Environment (build 1.8.0_402-b06)
OpenJDK 64-Bit Server VM (build 25.402-b06, mixed mode)

此时我的JDK路径为(记住，后面要用)

/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.402.b06-1.el7_9.x86_64

2 配置java环境目录

vim /etc/profile

export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.402.b06-1.el7_9.x86_64/jre
export CLASSPATH=.:${JAVA_HOME}/lib/rt.jar:${JAVA_HOME}/lib/dt.jar:${JAVA_HOME}/lib/tools.jar
export PATH=