$> uname -a
Linux VLAN-3434 3.2.0-2-686-pae #1 SMP Mon Jun 11 18:27:04 UTC 2012 i686 GNU/Linux

 $> cat /proc/version
Linux version 3.2.0-2-686-pae (Debian 3.2.20-1) (debian-kernel@lists.debian.org) (gcc version 4.6.3 (Debian 4.6.3-7) ) #1 SMP Mon Jun 11 18:27:04 UTC 2012

 $> cat /etc/os-release
PRETTY_NAME="Debian GNU/Linux wheezy/sid"
NAME="Debian GNU/Linux"
ID=debian
ANSI_COLOR="1;31"

 $> lsb_release -a
Distributor ID:	Debian
Description:	Debian GNU/Linux unstable (sid)
Release:	unstable
Codename:	sid

 $> zsh --version
zsh 4.3.17 (i686-pc-linux-gnu)

 $> emacs --version | head -n 1
GNU Emacs 23.4.1

 $> urxvt -help 2>&1 | head -n 2
rxvt-unicode (urxvt) v9.15 - released: 2012-01-21
options: perl,xft,styles,combining,blink,iso14755,unicode3,encodings=eu+vn+jp+jp-ext+kr+zh+zh-ext,fade,transparent,tint,pixbuf,XIM,frills,selectionscrolling,wheel,slipwheel,smart-resize,cursorBlink,pointerBlank,scrollbars=plain+rxvt+NeXT+xterm

 $> openbox --version | head -n 1
Openbox 3.5.0