CSDN■不看就亏系列！这里有完整的 Hadoop 集群搭建教程，和最易懂的 Hadoop 概念！| 附代码( 四 )

to make sure we haven't added extra keys that you weren't expecting. # 测试（是否能登录成功 [root@ chenc01 ~]# ssh 10.0.0.62 Last login: Fri Nov 29 17:15:15 2019 from 10.0.0.1 4）安装jdk[root@ chenc01 ~]# rpm -ivh jdk-8u131-linux-x64_.rpm Preparing... [100%] 1:jdk1.8.0_131 [100%] Unpacking JAR files... tools.jar... plugin.jar... javaws.jar... deploy.jar... rt.jar... jsse.jar... charsets.jar... localedata.jar... # 修改/etc/profile export JAVA_HOME=/usr/java/jdk1.8.0_131/ export JAVA_BIN=/usr/java/jdk1.8.0_131/bin/ export PATH=${JAVA_HOME}/bin:$PATH export CLASSPATH=.:${JAVA_HOME}/lib/dt.jar:${JAVA_HOME}/lib/tools.jar # 加载 [root@ chenc01 ~]# source /etc/profile # 查看java版本 [root@ chenc01 ~]# java -version java version "1.8.0_131" Java(TM) SE Runtime Environment (build 1.8.0_131-b11) Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode)问题：source 在数据库里还可以用来做什么？答：导入 5）在另外两个节点安装java/jdk[root@ chenc02 ~]# rpm -ivh jdk-8u131-linux-x64_.rpm Preparing... [100%] 1:jdk1.8.0_131 [100%] Unpacking JAR files... tools.jar... plugin.jar... javaws.jar... deploy.jar... rt.jar... jsse.jar... charsets.jar... localedata.jar... # 修改/etc/profile export JAVA_HOME=/usr/java/jdk1.8.0_131/ export JAVA_BIN=/usr/java/jdk1.8.0_131/bin/ export PATH=${JAVA_HOME}/bin:$PATH export CLASSPATH=.:${JAVA_HOME}/lib/dt.jar:${JAVA_HOME}/lib/tools.jar # 加载 [root@ chenc02 ~]# source /etc/profile # 查看java版本 [root@ chenc02 ~]# java -version java version "1.8.0_131" Java(TM) SE Runtime Environment (build 1.8.0_131-b11) Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode)6）安装namenode Hadoop 安装目录：/home/hadoop/hadoop-3.13 使用 root 帐号将 hadoop-3.1.3.tar.gz 上传到服务器，并且放到/home/hadoop下！

创建dfs和tmp

[root@ chenc01 ~]# su - hadoop [hadoop@ chenc01 ~]$ mkdir -p /home/hadoop/dfs/name /home/hadoop/dfs/data /home/hadoop/tmp [hadoop@ chenc01 ~]$ rz [hadoop@ chenc01 ~]$ whoami hadoop [hadoop@ chenc01 ~]$ ls dfs hadoop-3.1.3.tar.gz tmp

解压

[hadoop@ chenc01 ~]$ tar xvf hadoop-3.1.3.tar.gz [hadoop@ chenc01 ~]$ cd hadoop-3.1.3 [hadoop@ chenc01 hadoop-3.1.3]$ ll total 200 drwxr-xr-x 2 hadoop hadoop 4096 2019-09-12 12:46 bin