Chapter 3. Boot Process, Init, and Shutdown

65

3.7.1.5.

/etc/sysconfig/clock

The

/etc/sysconfig/clock

file controls the interpretation of values read from the system clock.

Earlier releases of Red Hat Linux used the following values (which are deprecated):

  CLOCKMODE= value

, where

value

is one of the following:

GMT

  Indicates that the clock is set to Universal Time (Greenwich Mean Time).

ARC

  Indicates the ARC console's 42 year time offset is in effect (for Alpha based systems

only).

Currently, the correct values are:

  UTC= value

, where

value

is one of the following boolean values:

true

  Indicates that the clock is set to Universal Time. Any other value indicates that it is set

to local time.

  ARC= value

, where

value

is the following:

true

  Indicates the ARC console's 42 year time offset is in effect. Any other value indicates

that the normal UNIX epoch is assumed (for Alpha based systems only).

  ZONE= filename

  Indicates the timezone file under

/usr/share/zoneinfo

that

/etc/localtime

is a copy of, such as:

ZONE="America/New York"

3.7.1.6.

/etc/sysconfig/desktop

The

/etc/sysconfig/desktop

file specifies the desktop manager to be run, such as:

DESKTOP="GNOME"

3.7.1.7.

/etc/sysconfig/dhcpd

The

/etc/sysconfig/dhcpd

file is used to pass arguments to the

dhcpd

daemon at boot time.

The

dhcpd

daemon implements the Dynamic Host Configuration Protocol (DHCP) and the Internet

Bootstrap Protocol (BOOTP). DHCP and BOOTP assign hostnames to machines on the network. For

more information about what parameters you can use in this file, type

man dhcpd

.

3.7.1.8.

/etc/sysconfig/firstboot

Beginning with Red Hat Linux 8.0, the first time you boot the system, the

/sbin/init

program calls

the

etc/rc.d/init.d/firstboot

script. This allows the user to install additional applications and

documentation before the boot process completes.

The

/etc/sysconfig/firstboot

file tells the

firstboot

command not to run on subsequent

reboots. If you want

firstboot

to run the next time you boot the system, simply remove

/etc/sysconfig/firstboot

and execute

chkconfig   level 5 firstboot on

.