ssh: Could not resolve hostname

1、如果系统为64位，无法启动启动hdfs: ./sbin/start-dfs.sh。并有以下错误：

 sed: -e expression #1, char 6: unknown option to `s'
 HotSpot(TM): ssh: Could not resolve hostname HotSpot(TM): Name or service not known
 64-Bit: ssh: Could not resolve hostname 64-Bit: Name or service not known
 Java: ssh: Could not resolve hostname Java: Name or service not known
 Server: ssh: Could not resolve hostname Server: Name or service not known
 VM: ssh: Could not resolve hostname VM: Name or service not known

解决方法为：

 vi etc/hadoop/hadoop-env.sh

加入：

 exportHADOOP_COMMON_LIB_NATIVE_DIR=${HADOOP_PREFIX}/lib/native

修改：

 export HADOOP_OPTS="-Djava.library.path=$HADOOP_PREFIX/lib"