... Defined
CHAPTER 1
Duties of the System Administrator
CHAPTER 2
Planning the Network
CHAPTER 3
Installing RedHat Linux
CHAPTER 4
Red HatLinux File System
CHAPTER 5
Red HatSystem Configuration Files
Part
I
b3632-X ... of other operating systems. Now, RedHat has employed innovations
that extend these duties even for the experienced Linux user. In this chapter, we
look at those requirements.
The LinuxSystem ... network,
installing RedHat Linux, and working
with the RedHatLinux file system and
configuration files.
b3632-X PtO1.F 2/21/02 8:33 AM Page 2
(Because of its built-in security features, Linux may not...
... ®
PRESS
®
®
®
PRESS
Red HatLinux Networking
and System Administration
Linux Solutions from the Experts at Red Hat
SECURITY TOOLS
INCLUDED ON CD-ROM
Collings
& Wall
Your Official Red Hat
đ
Linux
đ
... 13
Chapter 3 Installing RedHatLinux . . . . . . . . . . . . . . . . . . . . 27
Chapter 4 RedHatLinux File System . . . . . . . . . . . . . . . . . . 71
Chapter 5 RedHatSystem Configuration ... ensure that it runs optimally. Chapter 16
explains the RedHat Network, a service available from RedHat that you can use to
keep your system current. You can register your systems with RedHat and...
... covered is the RedHat Network, a subscription service
available with RedHat Enterprise Linux that you can use to keep your system
current. You can register your systems with RedHat and then ... mainframes. Linux in general, Fedora Core 4 and
Red Hat Enterprise Linux in particular, are very powerful operating systems
that can be used at the enterprise level as a full-fledged server. Linux ... We
want to emphasize that this book is useful for users of Fedora Core, the open
source community–based Linux project supported by Red Hat, as well as users
of RedHat Enterprise Linux.
Preface
ix
02_599496...
... the RedHatLinux security mailing list? (Find it at
www.redhat.com/mailing-lists /linux- security/index.html.)
Have you established a procedure that makes sure that every security update
is downloaded ... whatever came on the com-
puter, assuming that things came properly configured from the factory. The
user or enterprise that decides on Linux has decided, also, to assume the con-
trol that Linux ... Luckily for you, RedHat has created the Red
Hat Network, a program intended to help keep your system updated with the
latest security updates.
CROSS-REFERENCE Learn how to use the RedHat Network...
... RedHat boot disk starts your PC and the RedHatLinux installation
program. After you install RedHat Linux, you no longer need the Red Hat
boot disk (except when you want to reinstall RedHat ... which operating
systems to boot.
In the center of the Boot Loader screen is a box that shows any operating
systems, if there are any, that were detected on your system. The Red Hat
Linuxsystem ... installation section.
Creating the RedHat Boot Disk
To boot RedHatLinux for the first time and start the RedHatLinux installa-
tion program, you need a RedHat boot disk. For this step, you...
... the default operating system. The
default operatingsystem is the one with a check mark in the Default column
in Figure 3-10. In this case, RedHatLinux is the default operating system.
All ... PC. Atable then lists
the Linux partition and any other partitions that may contain another operating
system. If your system has a Linux partition and a DOS partition (that actually
has Windows ... or
deselect that package group.
TIP In an actual RedHatLinux installation, you install exactly those package
groups that you need. Each package group requires specific packages to run.
The RedHat installation...
... configure a
DHCP server. See Chapter 11 for details about configuring a DHCP server.
Summary
In this chapter, you learned about installing Fedora Core and RedHat Enter-
prise Linux using the ... the system volume, use the utility here.
■■ System Settings — This menu item contains Enterprise Linux system
administration utilities and some GNOME configuration utilities as well.
■■ System ... the folder that con-
tains the system mount point for the CD-R drive. Double-clicking
this icon displays the contents of the CD-ROM disk that you
inserted in the CD-R drive.
■■ Filesystem — This...
... at
the file system structure are the file system commands, essential to proper file
system management. In addition to the native Linux file system, Fedora Core
and RedHat Enterprise Linux support ... Configuration
All RedHat systems, whether Fedora Core or Enterprise Linux, use a similar
procedure for starting up the operating system. As the system boots, the oper-
ating system loads programs ... system
administrator or other users. The bin directory cannot contain
subdirectories.
■■ boot — On RedHat systems, this is the directory containing the ker-
nel, the core of the operating system. ...
... Enterprise Linux provide
support for many file systems. Linux supports those from other operating sys-
tems, remote file systems, memory file systems, CD-ROM file systems, virtual
file systems, ... handy since it reduces system administration
time. This is a fast file system, and now you can read and write to and from it
with your RedHatLinux machine.
Nonstandard Linux File Systems
Support ... more important system
configuration files on your RedHat system.
Systemwide Shell Configuration Scripts
These files determine the default environment settings of system shells and
what functions...
... directory should be edited by hand. For more informa-
tion on RedHat Network, see the RedHat Network Web site at https://
rhn.redhat.com.
Examining the Network Configuration Files
This section ... /etc/sysconfig
directory
Files to Change When Setting Up
a System or Moving the System
Whenever you set up a system to work on a new network, either because you’ve
just installed RedHat or you’re moving the machine from ... use it. APM is a monitoring daemon that works with power man-
agement code within the Linux kernel. It can alert you to a low battery if you
are using RedHatLinux on a laptop, among other things.
Figure...
... Window System 211
file that was created during system installation. A description of the section of
the file follows the file.
# XFree86 4 configuration created by redhat-config-xfree86
Section “ServerLayout”
Identifier ... example, a printer
attached to another RedHatLinuxsystem on your network). If you
choose this type of queue, you need to enter the server name and path
to the server, as shown in Figure 10-6.
Figure ... your Windows workgroup needs to be
entered here.
■■ Server — The name of the print server needs to be entered here.
■■ Share — This is the name of the shared printer on which you want to
print....
... and RedHat Enterprise Linux systems, the /etc/exports
file is the main NFS configuration file. It lists the file systems the server
exports, the systems permitted to mount the exported file systems, ... mp. If set, the NFS server will not
export a file system unless that file system is actually mounted on the server.
The reasoning behind this option is that a disk or file system containing an
NFS ... Services Configuration Tool (Red Hat ➪
System Settings ➪ Server Settings ➪ Services on Fedora Core and Applica-
tions ➪ System Settings ➪ Server Settings ➪ Services on RHEL); system-
config-services...
... administered repository for infor-
mation shared across the network using NIS. NIS clients are programs that use
NIS to query designated servers for information that is stored in the servers’
databases, ... ancient server running RedHatLinux 6.2
(we told you it was ancient). We kept getting an error indicating the server was
down when we knew it wasn’t. Finally, we logged into the server, discovered
it ... servers, you need to make sure
that they can successfully communicate with the master server. From each
slave server, make sure that the command ypwhich -m works, which means
that the slave servers...