hello world!!!!!

Your identification has been saved in /home/chenli0513/.ssh/id_dsa.
Your public key has been saved in /home/chenli0513/.ssh/id_dsa.pub.
The key fingerprint is:
eb:f3:63:93:0e:8b:73:25:ad:37:84:00:0f:a0:0d:1c chenli0513@ubuntu
The key's randomart image is:
+--[ DSA 1024]----+
|oEo.             |
| =  o            |
|. .  +           |
|      o          |
|       .So       |
|        o.+      |
|        o= .     |
|      .o+oB      |
|      .oo*o+     |
+-----------------+

chenli0513@ubuntu:/home$ mv hadoop-0.20.203.0rc1.tar.gz /home/app
mv: cannot stat `hadoop-0.20.203.0rc1.tar.gz': No such file or directory
chenli0513@ubuntu:/home$ sudo mv hadoop-0.20.203.0rc1.tar.gz /home/app
[sudo] password for chenli0513:
mv: cannot stat `hadoop-0.20.203.0rc1.tar.gz': No such file or directory
chenli0513@ubuntu:/home$ cd home
-bash: cd: home: No such file or directory
chenli0513@ubuntu:/home$ cd chenli0513
chenli0513@ubuntu:~$ sudo mv hadoop-0.20.203.0rc1.tar.gz /home/app
chenli0513@ubuntu:~$