SysV Init
The SysV init is a standard process used by Red Hat Linux
to control which software the init command launches
or shuts off on a given runlevel. SysV init chosen because it is easier to
use and more flexible than the traditional BSD style init process.
The configuration files for SysV init are in the
/etc/rc.d/ directory. Within this directory, are
the rc, rc.local, and
rc.sysinit scripts as well as the following
directories:
init.d
rc0.d
rc1.d
rc2.d
rc3.d
rc4.d
rc5.d
rc6.d |
The init.d directory contains the scripts used by
the init command when controlling services. Each of
the numbered directories represent the six default runlevels configured
by default under Red Hat Linux. For more information on runlevels, see the Section called Init Runlevels.
The default runlevel is listed in /etc/inittab.
To find out the default runlevel for your system, look for the line
similar to the one below near the top of
/etc/inittab:
The default runlevel listed in the example above is three, as the number
after the first colon indicates. If you want to change it, edit
/etc/inittab as root.
 | Warning |
|---|
| | Be very careful when editing /etc/inittab. Simple
typos can cause your system to become unbootable. If this happens, you
will either need a boot diskette for your system or you will need to enter
rescue mode to boot your computer and fix the file.
For more information on rescue mode, see the chapter titled
Rescue Mode in the
Official Red Hat Linux Customization Guide.
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