title: hadoop 2.2.0 64-bit installing but cannot start
body: <p>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:</p>
  
  <pre><code>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 &lt;libfile&gt;', 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
  ...
  </code></pre>
  
  <p>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?  </p>