How to verify patch level in oracle

How to verify patch level in oracle

[oracle@cal3idbs01 ~]$ cd $ORACLE_HOME/
[oracle@cal3idbs01 10.2.0.3]$ cd OPatch/
[oracle@cal3idbs01 OPatch]$ ls
crs  docs  emdpatch.pl  fmw  jlib  ocm  opatch  opatch.bat  opatch.ini  opatch.pl  opatchprereqs  README.txt
[oracle@cal3idbs01 OPatch]$ ./opatch lsinventory
Invoking OPatch 11.2.0.1.1
Oracle Interim Patch Installer version 11.2.0.1.1
Copyright (c) 2009, Oracle Corporation.  All rights reserved.
Oracle Home       : /opt/oracle/product/10.2.0.3
Central Inventory : /opt/oracle/oraInventory
   from           : /etc/oraInst.loc
OPatch version    : 11.2.0.1.1
OUI version       : 10.2.0.3.0
OUI location      : /opt/oracle/product/10.2.0.3/oui
Log file location : /opt/oracle/product/10.2.0.3/cfgtoollogs/opatch/opatch2010-02-03_11-16-50AM.log
Patch history file: /opt/oracle/product/10.2.0.3/cfgtoollogs/opatch/opatch_history.txt
Lsinventory Output file location : /opt/oracle/product/10.2.0.3/cfgtoollogs/opatch/lsinv/lsinventory2010-02-03_11-16-50AM.txt
Installed Top-level Products (2):
Oracle Database 10g                                                  10.2.0.1.0
Oracle Database 10g Release 2 Patch Set 2                            10.2.0.3.0
There are 2 products installed in this Oracle Home.
Interim patches (7) :
Patch  5957325      : applied on Sat Jan 02 11:37:43 MST 2010
   Created on 20 Mar 2008, 09:20:17 hrs PST8PDT
   Bugs fixed:
     5957325
Patch  5901891      : applied on Sat Jan 02 11:22:19 MST 2010
   Created on 16 Apr 2007, 00:14:55 hrs US/Pacific
   Bugs fixed:
     5548389, 5901923, 5885186, 5901891, 5881721
Patch  5240469      : applied on Sat Jan 02 11:18:23 MST 2010
   Created on 13 Feb 2007, 01:18:47 hrs US/Eastern
   Bugs fixed:
     5240469
Patch  5556081      : applied on Fri Jan 01 01:18:43  MST 2010
   Created on 29 May 2007, 00:23:10 hrs PST8PDT
   Bugs fixed:
     5556081
Patch  5632264      : applied on Fri Jan 01 01:17:45 MST 2010
   Created on 7 Feb 2007, 02:28:44 hrs US/Pacific
   Bugs fixed:
     5632264
Patch  5648872      : applied on Fri Jan 01 01:15:16 MST 2010
   Created on 23 Mar 2007, 21:04:04 hrs US/Pacific
   Bugs fixed:
     5648872
Patch  5557962      : applied on Fri Jan 01 01:01:49 MST 2010
   Created on 9 Nov 2006, 23:23:06 hrs PST8PDT
   Bugs fixed:
     4269423, 5557962, 5528974