hadoop在linux上的安装
配置免密码登录
ssh-keygen -t dsa -P '' -f ~/.ssh/id_dsa
cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys
test：ssh localhost
hadoop环境变量
export JAVA_HOME=/usr/local/jdk
export HADOOP_INSTALL=/usr/local/hadoop
export PATH=$PATH:$HADOOP_INSTALL/bin
修改hadoop配置
修改conf/core-site.xml
修改conf/hdfs-site.xml
修改conf/mapred-site.xml
启动
./bin/hadoop namenode -format
./bin/start-all.sh
测试
localhost:50030
localhost:50070