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摘要：运行hadoop程序时， 中途我把它终止了，然后再向hdfs加文件或删除文件时，出现Name node is in safe mode错误：rmr: org.apache.hadoop.dfs.SafeModeException: Cannot delete /user/hadoop/input. Name node is in safe mode解决的命令：bin/hadoop dfsadmin -safemode leave #关闭safe mode原文地址：http://shutiao2008.iteye.com/blog/318950 阅读全文

摘要：环境配置：Ubuntu11.10，Hadoop1.0.0安装ssh1 apt-get install ssh 安装rsync 1 apt-get install rsync 配置ssh免密码登录 1 ssh-keygen -t dsa -P '' -f ~/.ssh/id_dsa2 cat ~/.ssh/id_dsa.pub >>~/.ssh/authorized_keys 验证是否成功 1 ssh localhost下载Hadoop1.0.0,JDK新建 linux 终端，建立app目录，Java和Hadoop都将安装在此目录中。1 mkdir /home/app 阅读全文