ls -l | grep -i libclntsh.so
lrwxrwxrwx. 1 oracle dba       17 Sep 25 23:00 libclntsh.so -> libclntsh.so.11.1
-rwxr-xr-x. 1 oracle dba 41051464 Aug 29  2011 libclntsh.so.11.1

[root@localhost lib]# pwd
/u01/app/oracle/product/11.2.0/xe/lib