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Configure Tnsnames.ora

The "tnsnames.ora" file contains client side network configuration parameters. It can be

found in the "$ORACLE_HOME/network/admin" directory on the client. This file will also be

present on the server if client style connections are used on the server itself. Here is an

example of a "tnsnames.ora" file.

How do I generate a tnsnames.ora file to connect to an

Oracle Database

Su – oracle

$netca

Click on Local Net Service Name Configuration.

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Clink on Add Button

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Enter your Databae S!D

Enter "our Server !P Addre or #otName

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!f you ant to tet % Click on "e Perform &et

't(erie No% Do not tet

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Enter t(e Databae S!D 'ne )ore time.

Click No

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Click *ini( Button.

No &nentry Configured for t(e +e,ective Databae.

C(eck t(e tn entry in t(e belo location

Cd $'+ACLE-#')Enetorkadmin

$more tnname.ora

PROD =

  (DESCRIPTION =

  (ADDRESS_LIST =

  (ADDRESS = (PROTOCOL = TCP)(HOST = 10.105.32.41)(PORT = 1521))

  )

  (CONNECT_DATA =

  (SERVICE_NAME = PROD)

  )

  )

$ tnsping PROD

TNS Ping Utility for Linux: Version 10.2.0.1.0 Pro!u"tion on 2#%&200' 0(:)):1*+opyrig,t -" 1//' 200) Or"le. %ll rig,ts resere!.

Use! pr3eter files:

4pp4or"le4pro!u"t410.2.04!5614net7or84!3in4s9lnet.or

Use! TNSNAMES !pter to resole t,e lis

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%tte3pting to "ont"t -DS+R;PT;ON < -%DDRSS < -PROTO+OL < T+P-=OST < lo"l,ost

-PORT < 1)21 -+ONN+T6D%T% < -SRVR < DD;+%TD -SRV;+6N% < PROD

O> -10 3se"

Question:  I have just finished installing Oracle. I want to update mytnsnames.ora file,

 but I cannot find a tnsnames.ora file on my system. I thought the tnsnames.ora file would

 be created when I created the database. How do I create the tnsnames.ora?

Answer:  The tnsnames.ora is a S!"#et configuration file that normally resides in the

O$%&!'(HO)'*networ+*admin directory. Specifically, thetnsnames.ora defines

databases addresses so that connections can be made to them.

The creation of the database itself will not necessarily create the tnsnames.ora.  It is

created along with the  sqlnet.ora and listener.ora as part of the networ+ configuration.

 #ormally, the #etwor+ &onfiguration %ssistant  #'T&%- is started at the end of the

installation process however, if #'T&% fails or you e/it before completing,

the tnsnames.ora and the other files will not be created. Thetnsnames.ora and the other

 #'T&% created files are not necessary for connecting to the database locally from the

server. They are just for client access, so it is possible for the database to be created

 properly and the files not e/ist. Thetnsnames.ora file is located on both the client and

server systems, but there will be only one tnsnames.ora on each server regardless of how

many database instances e/ist.

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