09-05-2002
Linux, FreeBSD, Solaris, HP/UX, AIX, and other systems are collectively called UNIX-like systems. They all, practically speaking, conform to the standard (usually called POSIX) that is one good working definition of "UNIX-like."
(UNIX used to be a trademark that applied only to systems distributed by AT&T, but now it's part of a branding program that can be applied to any system that meets certain standards and otherwise qualifies according to the trademark owner, The Open Group.)
FreeBSD is indeed inside Mac OS X. However, it's invisible to the average Mac user. But, it's there, and more advanced users can get to it.
If you're after basic knowledge, reading up on the topic of "UNIX" will provide background for all of these systems, although not for the non-UNIX-like parts of Mac OS X. Beyond that, reading up on the specific systems you're using (e.g., Linux) make sense. For system administration, you can get even narrower, reading up on the brand-specific stuff (e.g., SuSE Linux).
Hope this helps...
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xbill(6) Games Manual xbill(6)
NAME
xbill - save your computers from Wingdows [TM] virus
SYNOPSIS
xbill [-l level] [--gui gui] [--sizesize] [-v] [-h]
DESCRIPTION
Ever get the feeling that nothing is going right? You're a sysadmin, and someone's trying to destroy your computers. The little people
running around the screen are trying to infect your computers with Wingdows [TM], a virus cleverly designed to resemble a popular operating
system. Your objective is to click the mouse on them, ending their potential threat. If one of the people reaches a computer, it will
attempt to replace your operating system with the virus it carries. It will then attempt to run off the screen with your vital software.
The game ends when only 1 (or 0) of your computers are being productive. Additionally, some computers are connected with network cables.
When one computer on a network becomes infected, a spark will be sent down the cable, and will infect the computer on the other end when it
reaches there.
Clicking the button on one of the little people will cause it to cry out in pain and melt (id software eat your heart out!), dropping the
stolen os if it is carrying one. If a computer is running Wingdows or is temporarily off, the os can be dragged back to the computer (or
another computer compatible with that os). To extinguish a spark, drag the bucket of water from the upper left corner onto it.
The status bar at the bottom tells the following:
Number of Bills on/off the screen
Number of Computers running their OS/off/Wingdows
Level
Score
OPTIONS
-l n Start at level n.
--gui gui
Use a specific front end. The possible values are gtk, motif, and athena. Note that some of these may not be compiled into the
binary.
--size size
Play on a field of size x size, instead of the normal 400x400. size must be larger than 400.
-v Print version number and exit.
-h Print help and exit.
When using the GTK gui, all standard GTK options are supported. When using the Athena or Motif GUI, all standard X Intrinsics options are
supported.
AUTHORS
Main Programmer:
Brian Wellington <bwelling@xbill.org>
Programming & graphics (v2.0 and earlier):
Matias Duarte <matias@hyperimage.com>
COPYING
Copyright (c) 1994-2001 Psychosoft
It's FREE! If you want to express your undying gratitude to us for bringing a small bit of meaning into your otherwise pointless existence,
you could always send us e-mail. XBill is distributed under the GNU General Public License.
Go play the game now!
Version 2.1 October 2001 xbill(6)