Module 4.2 Flashcards
What are the six stages of Linux Boot Process?
BIOS , MBR (Master Boot Record), Boot Manager, Kernal, Init./Systemd
What does MBR stand for?
Master Boot Record
What does BIOS stand for and what does it do?
BIOS stands for Basic Input/Output System
Performs some system integrity checks.
Searches, loads, and executes the boot loader program.
What does GRUB stand for?
and what does it do?
Grand Unified Bootloader
GRUB displays a splash screen, waits for few seconds, and
then loads the kernel image
What does the Kernel do?
Mounts the root file system.
Executes the /sbin/init program
Since init was the 1st program to be
executed by Linux Kernel, it has the process
id (PID) of 1.
Init and Systemd are both ___ ________ but it is better to use the systemd since it is commonly used in recent Linux Distros.
Systemd is a _____ ____ ______ _______ for Linux.
It’s designed to be backward compatible with SysV init scripts and used by many popular Linux distributions like:
Debian 8+, Ubuntu 15.04+, Fedora, Redhat 7+ /CentOS 7+,
Arch Linux, OpenSUSE.
Init and Systemd are both init daemons but it is better to use the systemd since it is commonly used in recent Linux Distros.
Systemd is a service and system manager for Linux.
It’s designed to be backward compatible with SysV init scripts and used by many popular Linux distributions like:
Debian 8+, Ubuntu 15.04+, Fedora, Redhat 7+ /CentOS 7+,
Arch Linux, OpenSUSE.
In SysVinit systems, you had a defined but
configurable set of runlevels numbered from 0 to __.
A runlevel is essentially a set of capabilities or running services that you can predefine and set _______________________________________.
In SysVinit systems, you had a defined but
configurable set of runlevels numbered from 0 to 6.
A runlevel is essentially a set of capabilities or running services that you can predefine and set the system to boot to so you have a predictable set of services.
