Getting error message when installing Hadoop 2.2.0

1143065 pts.
Tags:
Big Data
Hadoop
I've been trying to install Hadoop 2.2.0 cluster on my servers. All of the servers 64-bit and I've downloaded Hadoop and the configuration files are good to go. When I started to run ./start-dfs.sh, I keep getting this 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 ', 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
...
What should I do here? I appreciate the help.
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