[root@localhost ~]# uname -a
Linux localhost 2.6.18-1.2257.fc5 #1 SMP Fri Dec 15 16:07:14 EST 2006 x86_64 x86 _64 x86_64 GNU/Linux

[root@localhost ~]# /lib
lib/   lib64/
[root@localhost ~]# /lib/


[root@localhost ~]# /lib/libc.so.6
GNU C Library development release version 2.4, by Roland McGrath et al.
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
Compiled by GNU CC version 4.1.1 20060525 (Red Hat 4.1.1-1).
Compiled on a Linux 2.6.9 system on 2006-09-12.
Available extensions:
        The C stubs add-on version 2.1.2.
        crypt add-on version 2.1 by Michael Glad and others
        GNU Libidn by Simon Josefsson
        GNU libio by Per Bothner
        NIS(YP)/NIS+ NSS modules 0.19 by Thorsten Kukuk
        Native POSIX Threads Library by Ulrich Drepper et al
        BIND-8.2.3-T5B
Thread-local storage support included.
For bug reporting instructions, please see:
<http://www.gnu.org/software/libc/bugs.html>.



[root@localhost ~]# /lib64/libc.so.6
GNU C Library development release version 2.4, by Roland McGrath et al.
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
Compiled by GNU CC version 4.1.1 20060525 (Red Hat 4.1.1-1).
Compiled on a Linux 2.6.9 system on 2006-09-12.
Available extensions:
        The C stubs add-on version 2.1.2.
        crypt add-on version 2.1 by Michael Glad and others
        GNU Libidn by Simon Josefsson
        GNU libio by Per Bothner
        NIS(YP)/NIS+ NSS modules 0.19 by Thorsten Kukuk
        Native POSIX Threads Library by Ulrich Drepper et al
        BIND-8.2.3-T5B
Thread-local storage support included.
For bug reporting instructions, please see:
<http://www.gnu.org/software/libc/bugs.html>.


[root@localhost ~]# which javac
/usr/bin/javac
[root@localhost ~]# javac  -version
Eclipse Java Compiler v_585_R31x, 3.1.2 release, Copyright IBM Corp 2000, 2006. All rights reserved.