hadoop: Could not resolve hostname ***

hadoop单机配置，启动start-all.sh时，出现很多Could not resolve hostname xxx ：

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highly: ssh: Could not resolve hostname highly: Name or service not known
fix: ssh: Could not resolve hostname fix: Name or service not known
the: ssh: Could not resolve hostname the: Name or service not known

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在确保配置了主机名之后(/etc/hosts & /etc/sysconfig/network)，在/etc/profile添加如下配置解决：

export HADOOP_HOME=/home/software/hadoop/hadoop-2.6.1
export PATH=$PATH:$HADOOP_HOME/bin:$HADOOP_HOOME/sbin:$HADOOP_HOME/lib
export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native
export HADOOP_OPTS="-Djava.library.path=$HADOOP_HOME/lib"

修改/etc/profile，别忘了source /etc/profile使修改生效

参考源文：http://www.tuicool.com/articles/BBFfmu