Hadoop安装教程_Hadoop2.7.3/Ubuntu

参考：
http://www.powerxing.com/linux-environment-variable/
http://blog.sina.com.cn/s/blog_a001e5980102vqk2.html
http://www.powerxing.com/install-hadoop-cluster/
http://www.cnblogs.com/shijiaoyun/p/5796819.html

Web UIs for the Common User

The default Hadoop ports are as follows:

	Daemon	Default Port	Configuration Parameter
HDFS	Namenode	50070	dfs.http.address
	Datanodes	50075	dfs.datanode.http.address
	Secondarynamenode	50090	dfs.secondary.http.address
	Backup/Checkpoint node?	50105	dfs.backup.http.address
MR	Jobracker	50030	mapred.job.tracker.http.address
	Tasktrackers	50060	mapred.task.tracker.http.address

遇见的问题：

配置环境变量：

步骤1 ：vim   ~/.bashrc

步骤2 ：
export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64
export JRE_HOME=$JAVA_HOME/jre
export CLASSPATH=.:$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH
export HADOOP_HOME=/opt/hadoop273
export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$HADOOP_HOME/bin:$PATH
步骤3 ：：wq
步骤4 ：  source ~/.bashrc

遇见的问题：
apt-get  update
W: 无法下载 bzip2:/var/lib/apt/lists/partial/ppa.launchpad.net_fcitx-team_ni校验和不符

解决办法：

1. cd /etc/apt/sources.list.d 
   
2. 删除对应的源rm -rf xxx
   
3. apt-get  update