Chapter 3+4

Question 1

Purpose of /boot

Answer 1

Contains files necessary to start boot process of the system, such as boot loader configurations and kernel images

Question 2

Purpose of /etc

Answer 2

Stores system.specific configuration files
Files that control behaviour of various system components and applications

Question 3

Purpose of /home

Answer 3

Home directory for regular users
Stores user-specific data and configuration files

Question 4

Purpose of /root

Answer 4

Home directory for administrative superuser
Contains configuration files and data specific to the root user

Question 5

Purpose of /usr

Answer 5

Contains installed software, shared libraries, user commands, system administration commands, locally customized software

Question 6

Purpose of /var

Answer 6

Stores system-specific variable data that should persist between boots, including dynamically changing files

Question 7

ls -l

Answer 7

long listing format

Question 8

ls -a

Answer 8

list all files

Question 9

ls -R

Answer 9

list recursively

Question 10

cd -

Answer 10

change to previous directory, where user was before current one

Question 11

cd ..

Answer 11

change to parent directory

Question 12

cd

Answer 12

change to home directory

Question 13

mkdir

Answer 13

make a directory

Question 14

mkdir -p Files/file

Answer 14

create any missing parent directories for requested destination

Question 15

cp

Answer 15

copy one or multiple files to a target directory

Question 16

cp -r

Answer 16

recursively copy a directory

Question 17

mv

Answer 17

rename or move a file

Question 18

rm

Answer 18

remove a file

Question 19

rm -r

Answer 19

remove a directory and its contents

Question 20

rm -ri

Answer 20

interactively prompt for confirmation before deleting a directory and its contents

Question 21

rmdir

Answer 21

remove empty directory

Question 22

ln

Answer 22

create a hard link
another file name that points to an existing file

Question 23

ln -i file.txt newfile.txt

Answer 23

Determine whether or not two files are linked
If they are, the inode numbers are the same

Question 24

ln -s file.txt newfile.txt

Answer 24

Create a symbolic link between two files/a file and a directory

Question 25

USERVAR=john
echo $USERVAR
What is the output?

Answer 25

john

Question 26

USERVAR=john
echo $USERVAR
What is the output?

Answer 26

$USERVAR

Question 27

man

Answer 27

get manual page for command

Question 28

man -k word

Answer 28

search for manual page containing word in titles and descriptions

Question 29

man -K word

Answer 29

search for manual page contaning word in full-text page, not just title and description