لطفا منتظر باشید ...
Linux
Distributions
One of the challenges of administering Linux
is that Linux isn't a single OS. Instead, it's a collection of OSs , all built around the same kernel. Each
of these variant OSs is known
as a distribution. A distribution consists of a
Linux kernel; a distribution-specific installation program; a wide assortment
of support tools, user programs, and so on; and a set of default startup and
configuration scripts. Different distributions frequently use different versions
of the Linux kernel and of support programs. Indeed, they sometimes ship with
different programs entirely to fill particular roles, such as sendmail, Exim,
or Postfix for a mail server. For these reasons, Linux distributions can vary
substantially in overall feel and in many administrative details.Many books on Linux fail to address the
variability among Linux distributions. They intentionally focus on just one
distribution, or provide coverage of others in a cursory manner. One of the
goals of this book, though, is to cover several of the most popular Linux
distributions explicitly. Specifically, I cover Caldera OpenLinux 3.1, Debian
GNU/Linux 2.2, Mandrake 8.1, Red Hat 7.2, Slackware 7.0, SuSE 7.3, and
TurboLinux 7.0. To be sure, I can't cover every detail for each of these OSs,
but I point out where they differ in important ways, such as where each places
network startup scripts and what FTP servers each includes. Some
chaptersnotably those on server startup tools, LPD print servers, SMTP mail servers,
and FTP serverscover multiple servers in order to be applicable to the default
configurations for each of these seven major Linux distributions.
