启动时整个输出很多信息，正常情况下，应该只有几行，启动了namenode、datanode等，
但是我在启动的时候却一直报‘ssh: Could not resolve hostname ’
具体信息如下：
[root@hbase ~]# start-dfs.sh
with: ssh: Could not resolve hostname with: Temporary failure in name resolution
it: ssh: Could not resolve hostname it: Temporary failure in name resolution
<libfile>',: ssh: Could not resolve hostname <libfile>',: Temporary failure in name resolution
'-z: ssh: Could not resolve hostname '-z: Temporary failure in name resolution
hbase: starting namenode, logging to /usr/local/hadoop-2.6.0/logs/hadoop-root-namenode-hbase.out
hbase: starting datanode, logging to /usr/local/hadoop-2.6.0/logs/hadoop-root-datanode-hbase.out
Starting secondary namenodes [Java HotSpot(TM) Client VM warning: You have loaded library /usr/local/hadoop-2.6.0/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'.
0.0.0.0]
sed: -e expression #1, char 6: unknown option to `s'
You: ssh: Could not resolve hostname You: Temporary failure in name resolution
warning:: ssh: Could not resolve hostname warning:: Temporary failure in name resolution
loaded: ssh: Could not resolve hostname loaded: Temporary failure in name resolution
which: ssh: Could not resolve hostname which: Temporary failure in name resolution
library: ssh: Could not resolve hostname library: Temporary failure in name resolution
HotSpot(TM): ssh: Could not resolve hostname HotSpot(TM): Temporary failure in name resolution
VM: ssh: Could not resolve hostname VM: Temporary failure in name resolution
Java: ssh: Could not resolve hostname Java: Temporary failure in name resolution
stack: ssh: Could not resolve hostname stack: Temporary failure in name resolution
have: ssh: Could not resolve hostname have: Temporary failure in name resolution
have: ssh: Could not resolve hostname have: Temporary failure in name resolution
The: ssh: Could not resolve hostname The: Temporary failure in name resolution
Client: ssh: Could not resolve hostname Client: Temporary failure in name resolution
might: ssh: Could not resolve hostname might: Temporary failure in name resolution
fix: ssh: Could not resolve hostname fix: Temporary failure in name resolution
will: ssh: Could not resolve hostname will: Temporary failure in name resolution
disabled: ssh: Could not resolve hostname disabled: Temporary failure in name resolution
the: ssh: Could not resolve hostname the: Temporary failure in name resolution
try: ssh: Could not resolve hostname try: Temporary failure in name resolution
VM: ssh: Could not resolve hostname VM: Temporary failure in name resolution.........
