hadoop的伪分布式安装
查看官网：http://hadoop.apache.org/docs/r2.5.2/hadoop-project-dist/hadoop-common/SingleCluster.html配置hadoop
1上传hadoop包
2解压hadoop包
tar -zxvf hadoop-*.tar.gz -C /usr/local/
3配置hadoop伪分布式
第一个：hadoop-env.sh
vim hadoop-env.sh
export JAVA_HOME=/usr/java/jdk
第二个：core-site.xml
vim core-site.xml
fs.default.name
hdfs://hadoop01:9000
第三个：hdfs-site.xml
vim hdfs-site.xml
dfs.replication
1
4将hadoop添加到环境变量
vim /etc/profile
export JAVA_HOME=/usr/java/jdk
export HADOOP_HOME=/usr/local/hadoop
export PATH=.:$PATH:$JAVA_HOME/bin:$HADOOP_HOME/bin
source /etc/profile
5格式化HDFS
hadoop namenode -format
6启动hadoop
start-dfs.sh
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