Assume the configuration for installation follows here
http://blog.youkuaiyun.com/wxhawk/archive/2009/12/19/5040007.aspx
select menu 'Oracle - OraDb11g_home' - 'Configuration and Migration Tools' - 'Database Configuration Assistant'
and follow the steps shown below.
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
Step 8
Step 9
Step 10
Step 11
Step 12
Step 13
Step 14