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經過了重重險阻和煩人的事前準備工作，終於走到這一步了...
讓我們開始安裝 Debian GNU/Linux 吧！
這裡的範例是以 CD-ROM 來安裝 Debian GNU/Linux。如果您是使用軟碟片來安裝的話，不用太擔心，步驟幾乎是一模一樣的。
在以光碟開機後，會出現這個歡迎畫面。按下 <Enter> 來直接開機，或是按下 <F3> 來指定開機的參數。
如果您想使用 Kernel 2.4.18 的核心，在按下 <F3> 後，鍵入 bf24 <Enter> 即可，否則將會以 Kernel 2.2.20 來安裝。
使用軟碟片來安裝的人在下載時就要選定所使用的核心，所以沒有這些選項的。
如果您的電腦無法正確顯示 Linux 的圖形介面（如某些 Notebook）、或是您的電腦的速度不夠快，可以使用 video=vga16:off 這個參數來進入純文字的安裝模式，但是這樣一來就不能使用中文的安裝介面了。
如果安裝程式無法支援某些 RAID 控制卡，像是 Adaptec-2400A 之類的，可以在這裡使用 bf2.4 flavor 選項，再用磁片來載入它的驅動程式。
Welcome to Debian GNU/Linux 3.0!
This is a Debian CD-ROM. Keep it available once you have installed
your system, as you can boot from it to repair the system on your hard
disk if that ever becomes necessary (press <F3> for details).
For a "Safe" installation with kernel 2.2.20, you can press <ENTER> to begin.
If you want additional features like modern hardware support, specify a
defferent boot flavor at the poot prompt (press <F3> to get an overview).
If you run into trouble or if you already have questions, press <F1>
for quick installation help.
WARNING: You should completely back up all of your hard disks before
proceeding. The installation procedure can completely and irreversibly
erase them! If you haven't made backups yet, remove the CD-ROM
from the drive and press <RESET> or <Control-Alt-Del> to get back to
your old system.
Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law. For copyright information, press <F10>.
Press <F1> for help, or <ENTER> to boot.
boot: _
那麼在這裡就輸入 bf24 video=vga16:off 開機了。
接下來出現的是歡迎畫面。
您可以在安裝過程中隨時按下 <Ctrl><Alt><Del> 來中斷安裝並重新開機。
☆ 如果您要在安裝 Debian GNU/Linux 之前還要先做一些設定，如：分割硬碟，
可以在任何時刻按下 <Alt><F2> 進入 CLI (Command Line Interface) 來進行這些設定。
設定完畢後可以按 <Alt><F1> 回到原始安裝畫面哦！
我們就來開始一步一步安裝 Debian GNU/Linux 吧：
其實目前為止安裝程式只走了一半。重開機後還有後半段要努力呢！
如果這時無法順利重新開機，大多是在建立 LILO 時出了問題。沒關係，我們使用緊急修復模式開機：
接下來續繼我們的安裝工作：
(1) Internet site; mail is sent and received directly using SMTP. If your
needs don't fit neatly into any category, you probably want to start
with this one and then edit the config file by hand.
(2) Internet site using smarthost: You receive Internet mail on this
machine, either directly by SMTP or by running a utility such as
fetchmail. Outgoing mail is sent using a smarthost. optionally with
addresses rewritten. This is probably what you want for a dialup
system.
(3) Satellite system: All mail is sent to another machine, called a "smart
host" for delivery. root and postmaster mail is delivered according
to /etc/aliases. No mail is received locally.
(4) Local delivery only: You are not on a network. Mail for local users
is delivered.
(5) No configuration: No configuration will be done now; your mail system
will be broken and should not be used. You must then do the
configuration yourself later or run this script, /usr/sbin/eximconfig,
as root. Look in /usr/share/doc/exim/example.conf.gz
Select a number from 1 to 5, from the list above.
Enter value (default=`1', `x' to restart): _
Mail for the `postmaster' and `root' accounts is usually redirected to one or more user accounts, of the actual system administrators. By default, I'll set things up so that mail for `postmaster' and for various system accounts is redirected to `root', and mail for `root' is redirected to a real user. This can be changed by editing /etc/aliases. Note that postmaster-mail should usually be read on the system it is directed to, rather than being forwarded elsewhere, so (at least one of) the users you choose should not redirect their mail off this machine. Which user account(s) should system administrator mail go to ? Enter one or more usernames separated by spaces or commas . Enter `none' if you want to leave this mail in `root's mailbox - NB this is strongly discouraged. Also, note that usernames should be lowercase! Enter value (`x' to restart):
到這裡，Debian 的安裝工作大功告成！這時，可以用 root 登入進來看一下什麼是 Debian GNU/Linux 了。
或者也可以按下 <Ctrl><Alt><Del> 重新開機，使用備份軟體把 Debian GNU/Linux 備份起來再說。