After 11.2g new installation invoking sqlplus fails with SP2-1503 SP2-0152

Problem Description
After new Oracle 11.2g installation(64 bit) invoking sqlplus returns SP2-1503 SP2-0152 errors like below.

$ sqlplus
SP2-1503: Unable to initialize Oracle call interface
SP2-0152: ORACLE may not be functioning properly

If you browse to $ORACLE_HOME/oracore/zoneinfo directory and check privilege by using command ls -l you will see a similar output like below,

$cd $ORACLE_HOME/oracore/zoneinfo
$ls -l 
total 10092
drwxr-xr-x 2 oracle dba 4096 May 12 17:02 big
drwxr-xr-x 2 oracle dba 4096 May 12 17:02 little
-rw-r--r-- 1 oracle dba 5725 Jun 12 12:02 readme.txt
-rw-r--r-- 1 oracle dba 25681 Jun 16 12:02 timezdif.csv
-rw-r--r-- 1 oracle dba 792894 Jul 10 10:11 timezlrg_10.dat
-rw-r--r-- 1 oracle dba 787272 Jul 10 10:11 timezlrg_11.dat
-rw-r--r-- 1 oracle dba 493675 Jul 10 10:11 timezlrg_1.dat
-rw-r--r-- 1 oracle dba 507957 Jul 10 10:11 timezlrg_2.dat
-rw-r--r-- 1 oracle dba 527717 Jul 10 10:11 timezlrg_3.dat
-rw-r--r-- 1 oracle dba 531137 Jul 10 10:11 timezlrg_4.dat
-rw-r--r-- 1 oracle dba 587487 Jul 10 10:11 timezlrg_5.dat
-rw-r--r-- 1 oracle dba 586750 Jul 10 10:11 timezlrg_6.dat
-rw-r--r-- 1 oracle dba 601242 Jul 10 10:11 timezlrg_7.dat
-rw-r--r-- 1 oracle dba 616723 Jul 10 10:11 timezlrg_8.dat
-rw-r--r-- 1 oracle dba 801410 Jul 10 10:11 timezlrg_9.dat
-rw-r--r-- 1 oracle dba 345637 Jul 10 10:11 timezone_10.dat
-rw-r--r-- 1 oracle dba 345356 Jul 10 10:11 timezone_11.dat
-rw-r--r-- 1 oracle dba 274427 Jul 10 10:11 timezone_1.dat
-rw-r--r-- 1 oracle dba 274900 Jul 10 10:11 timezone_2.dat
-rw-r--r-- 1 oracle dba 286651 Jul 10 10:11 timezone_3.dat
-rw-r--r-- 1 oracle dba 286264 Jul 10 10:11 timezone_4.dat
-rw-r--r-- 1 oracle dba 286310 Jul 10 10:11 timezone_5.dat
-rw-r--r-- 1 oracle dba 286217 Jul 10 10:11 timezone_6.dat
-rw-r--r-- 1 oracle dba 286815 Jul 10 10:11 timezone_7.dat
-rw-r--r-- 1 oracle dba 302100 Jul 10 10:11 timezone_8.dat
-rw-r--r-- 1 oracle dba 351525 Jul 10 10:11 timezone_9.dat

Cause of the Problem
If you look for the ls -l output you will see timezone.dat and timezlrg.dat are not present but multiple versions timezlrg.* and timezone.* are present. The problem happened because there is a choice of timezone versions are available.

Solution of the Problem
To resolve the problem, create links to one of the timezone_nn.dat files. While creating symbolic links you should choose the latest timezone version unless you have a requirement for a specific version.

$ cd $ORACLE_HOME/oracore/zoneinfo
$ ln -s timezone_11.dat timezone.dat
$ ln -s timezlrg_11.dat timezlrg.dat