hadoop安装笔记

环境是ubuntu

java啥的有yum

apt-get install default-jdk

update-alternatives --display Java

hadoop解压缩就行

tar -zxvf xxxx.tar.gz

hadoop需要ssh密钥

ssh-keygen -t dsa -P '' -f ~/.ssh/id_dsa

cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys

java环境变量可以省下了，但是hadoop用到的地方还是要自己设置

sudo nano ~/.bashrc

需要设置的是JAVA_HOME,HADOOP_HOME,PATH,HADOOP_MAPRED_HOME,HADOOP_COMMON_HOME,HADOOP_HDFS_HOME,YARN_HOME,

HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native,

HADOOP_OPTS="-Djava.library.path=$HADOOP_HOME/lib",

JAVA_LIBRARY_PATH=$HADOOP_COMMON_LIB_NATIVE_DIR:$JAVA_LIBRARY_PATH 引入hadoop的包。

source ~/.bashrc

安装完成