101.2 Boot the System (Boot Process - systemd and upstart - Power on to System Prompt)

Question 1

systemd

default on most modern Linux distributions

Answer 1

systemd

Question 2

systemd

systemd was designed to replace the “__” mehod of managing system init and startup

Answer 2

sysvinit

Question 3

systemd

systemd is more efficient and allows

Answer 3

parallel operation

Question 4

systemd

has fewer

Answer 4

dependencies

Question 5

systemd

service prioritization and

Answer 5

precedence

Question 6

systemd

reduces “______” time

Answer 6

startup

Question 7

systemd

units replace sysvinit

Answer 7

init scripts

Question 8

systemd

‘name.service’ rather than

Answer 8

init script name

Question 9

systemd major components

manager for services and systems

Answer 9

systemd

Question 10

systemd major components

primary command for controlling service start/stop/restart/status

Answer 10

systemctl

Question 11

systemd major components

display performance info on system bootup and allows for trace/debugging info

Answer 11

systemd-analyze

Question 12

systemd major components

replaces consolekit, supports X Windows manager

Answer 12

logind

Question 13

systemd major components

console daemon that replaces virtual terminals

Answer 13

consoled

Question 14

systemd major components

logging system uses binary logs and is replaceable by other logging systems

Answer 14

journald

Question 15

systemd major components

networking support daemon

Answer 15

networkd

Question 16

systemd runlevels

indicated in component groups

Answer 16

cgroup

Question 17

systemd units

the units insalled

Answer 17

/usr/lib/systemd/system

Question 18

systemd units

units that have priority over other units are controlled by sysadmin

Answer 18

/etc/systemd/system

Question 19

systemd units

units created at runtime and may have priority over non-runtime or installed units

Answer 19

/run/systmd/system

Question 20

systemd service target dependencies

method of inidicating dependency units or groups of units

Answer 20

on the system

Question 21

systemd service target dependencies

Requires

Answer 21

once requirement is met any other ‘wanted’ units started

Question 22

systemd service target dependencies

only executed upon completion of any other ‘wanted units

Answer 22

/usr/lib/systemd/system/graphical.target

example

Question 23

systemd boot process changes

not read and no longer in use

Answer 23

/etc/inittab

Question 24

systemd boot process changes

a tree of ‘requires’ and ‘wants’ is followed

Answer 24

throughout process

Question 25

systemd boot process changes

displays current runlevel and previous if available

Answer 25

runlevel

Question 26

systemd boot process changes

displays current default runlevel target

Answer 26

systemctl get-default

Question 27

systemd boot process changes

set default runlevel target to the indicated value

Answer 27

systemctl set-default [new.target]

Question 28

systemd boot process changes

systemctl set-default [new.target] creates a default link from ‘default-target’ to the

Answer 28

indicated target

Question 29

list all active system targets

Answer 29

systemctl isolate [runlevel.target]

Question 30

systemd boot process changes

systemctl isolate [runlevel.target] allows you to set the runlevel of the system without changing

Answer 30

default value

Question 31

systemd upstart

asynchronous boot and shutdown process

Answer 31

upstart

Question 32

systemd upstart

upstart is designed to implement as it maintains

Answer 32

sysinit compatibility - can run sysvinit scripts unchanged