Check Oracle & Linux versions

How to check Oracle version..

[oracle@stardb ~]$ sqlplus

SQL*Plus: Release 10.2.0.1.0 - Production on Fri Mar 18 10:50:21 2011

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

Enter user-name: sys as sysdba
Enter password:

Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options



How to check Linux version...

[oracle@stardb admin]$ uname -m
x86_64

or

[oracle@stardb admin]$ file /usr/bin/file
/usr/bin/file: ELF 64-bit LSB executable, AMD x86-64, version 1 (SYSV), for GNU/Linux 2.6.9, dynamically linked (uses shared libs), for GNU/Linux 2.6.9, stripped