将以下条目添加到.bashrc中，其中HADOOP_HOME是您的hadoop文件夹：

  export HADOOP_COMMON_LIB_NATIVE_DIR = $ HADOOP_HOME / lib / native 
 export HADOOP_OPTS = -  Djava.library.path = $ HADOOP_HOME / lib
$ c 


 $ b 
另外，执行以下命令： 


  ssh-keygen -t rsa -P''-f〜/ .ssh / id_rsa 
 cat〜/ .ssh / id_rsa.pub>> 〜/ .ssh / authorized_keys 
 
 

I am trying to install Hadoop 2.2.0 Cluster on the servers. For now all the servers are 64-bit, I download the Hadoop 2.2.0 and all the configuration files have been set up. When I am running ./start-dfs.sh, I got the following error:
13/11/15 14:29:26 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Starting namenodes on [Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /home/hchen/hadoop-2.2.0/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard. The VM will try to fix the stack guard now.It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.namenode]
sed: -e expression #1, char 6: unknown option to `s' have: ssh: Could not resolve hostname have: Name or service not known
HotSpot(TM): ssh: Could not resolve hostname HotSpot(TM): Name or service not known
-c: Unknown cipher type 'cd'
Java: ssh: Could not resolve hostname Java: Name or service not known
The authenticity of host 'namenode (192.168.1.62)' can't be established.
RSA key fingerprint is 65:f9:aa:7c:8f:fc:74:e4:c7:a2:f5:7f:d2:cd:55:d4.
Are you sure you want to continue connecting (yes/no)? VM: ssh: Could not resolve        hostname VM: Name or service not known
You: ssh: Could not resolve hostname You: Name or service not known
warning:: ssh: Could not resolve hostname warning:: Name or service not known
library: ssh: Could not resolve hostname library: Name or service not known
have: ssh: Could not resolve hostname have: Name or service not known
64-Bit: ssh: Could not resolve hostname 64-Bit: Name or service not known
...

Beside the 64-bit, is there any other errors? I have finished the log in between namenode and datanodes without password, what do the other errors mean?  

Add the following entries to .bashrc where HADOOP_HOME is your hadoop folder:
export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native
export HADOOP_OPTS="-Djava.library.path=$HADOOP_HOME/lib"

In addition, execute the following commands:
ssh-keygen -t rsa -P '' -f ~/.ssh/id_rsa
cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys