As my experience, here step by step:
Problem Solving when IP Address Sandbox in Horton in Browser Unable :
1.Login
username:root
password:hadoop
2. ifconfig
Find out IP Address in HWaddr
in this case: 192.168.56.101
3. On Windows Operating System
Click Windows (Start) > All Programs > Accessories > Choose Notepad by right click dan
choose klik kanan “Run as Administrator”.
4. On Notepad
FILE > OPEN… > hosts file..
C:\windows\system32\drivers\etc\ pilih file “hosts”
The write:
192.168.56.101 sandbox
Then save.
5. On Browser:
type:
http://sandbox:50070 <enter> ;checking status ‘active’
type: sandbox:8088 <enter> ; hadoop starting