SQL> select * from v$version
  2  /

BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
PL/SQL Release 11.2.0.1.0 - Production
CORE    11.2.0.1.0      Production
TNS for 32-bit Windows: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production

SQL> select * from recyclebin
  2  /

OBJECT_NAME                    ORIGINAL_NAME                    OPERATION TYPE                      
------------------------------ -------------------------------- --------- ------------------------- 
BIN$80VNR20YR6eO2mRNs3v7vA==$0 T                                DROP      TABLE                     
BIN$wyze0BJfQ12cb0XMUwUscA==$0 TEMP                             DROP      TABLE                     
BIN$gPcHwa3iQL24TIPY0j+frg==$0 J                                DROP      TABLE                     

SQL> purge recyclebin
unknown command beginning "purge recy..." - rest of line ignored.
SQL> 

[oracle@localhost dbs]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.2.0 Production on Sun Jun 21 07:21:34 2015

Copyright (c) 1982, 2010, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> select * from V$version;

BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - Production
PL/SQL Release 11.2.0.2.0 - Production
CORE    11.2.0.2.0      Production
TNS for Linux: Version 11.2.0.2.0 - Production
NLSRTL Version 11.2.0.2.0 - Production

SQL> purge recyclebin;

Recyclebin purged.

SQL>