Startup database with ORA-00000

SQL*Plus: Release Production on Mon May 20 12:26:29 2013

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SQL> startup ;
ORA-00000: normal, successful completion

you need to investigate  more about this error most the cause for this error :
1- Oracle Home contain “/” in the end of detestation.
2- if one not works for you, Then you need to check your networks included with listener
Thank you 
Osama Mustafa