Linux From Scratch - Version 12.2

Chapter 9. System Configuration

9.2. LFS-Bootscripts-20240825

The LFS-Bootscripts package contains a set of scripts to start/stop the LFS system at bootup/shutdown. The configuration files and procedures needed to customize the boot process are described in the following sections.

Approximate build time: less than 0.1 SBU
Required disk space: 248 KB

9.2.1. Installation of LFS-Bootscripts

Install the package: 

make install

9.2.2. Contents of LFS-Bootscripts

Installed scripts: checkfs, cleanfs, console, functions, halt, ifdown, ifup, localnet, modules, mountfs, mountvirtfs, network, rc, reboot, sendsignals, setclock, ipv4-static, swap, sysctl, sysklogd, template, udev, and udev_retry
Installed directories: /etc/rc.d, /etc/init.d (symbolic link), /etc/sysconfig, /lib/services, /lib/lsb (symbolic link)

Short Descriptions

checkfs

Checks the integrity of the file systems before they are mounted (with the exception of journaling and network-based file systems)

cleanfs

Removes files that should not be preserved between reboots, such as those in /run/ and /var/lock/; it re-creates /run/utmp and removes the possibly present /etc/nologin, /fastboot, and /forcefsck files

console

Loads the correct keymap table for the desired keyboard layout; it also sets the screen font

functions

Contains common functions, such as error and status checking, that are used by several bootscripts

halt

Halts the system

ifdown

Stops a network device

ifup

Initializes a network device

localnet

Sets up the system's hostname and local loopback device

modules

Loads kernel modules listed in /etc/sysconfig/modules, using arguments that are also given there

mountfs

Mounts all file systems, except those that are marked noauto, or are network based

mountvirtfs

Mounts virtual kernel file systems, such as proc

network

Sets up network interfaces, such as network cards, and sets up the default gateway (where applicable)

rc

The master run-level control script; it is responsible for running all the other bootscripts one-by-one, in a sequence determined by the names of the symbolic links to those other bootscripts

reboot

Reboots the system

sendsignals

Makes sure every process is terminated before the system reboots or halts

setclock

Resets the system clock to local time if the hardware clock is not set to UTC

ipv4-static

Provides the functionality needed to assign a static Internet Protocol (IP) address to a network interface

swap

Enables and disables swap files and partitions

sysctl

Loads system configuration values from /etc/sysctl.conf, if that file exists, into the running kernel

sysklogd

Starts and stops the system and kernel log daemons

template

A template to create custom bootscripts for other daemons

udev

Prepares the /dev directory and starts the udev daemon

udev_retry

Retries failed udev uevents, and copies generated rules files from /run/udev to /etc/udev/rules.d if required