Simple commands

Question 1

pwd

Answer 1

Print current directory

Question 2

cd

Answer 2

change directory

Question 3

cd ..

Answer 3

go to home directory

Question 4

~/

Answer 4

Move deeper

Question 5

tab tab

Answer 5

watch deeper

Question 6

tab

Answer 6

autocomplete

Question 7

ls

Answer 7

list files and folders

Question 8

clear

Answer 8

clear terminal

Question 9

mv

Answer 9

move

Question 10

touch

Answer 10

create file

Question 11

mkdir

Answer 11

create folder

Question 12

/*

Answer 12

all filestail

Question 13

-p

Answer 13

recursion

Question 14

tree

Answer 14

show tree view

Question 15

rm

Answer 15

remove file

Question 16

-r

Answer 16

recursive deleting

Question 17

-f

Answer 17

force

Question 18

cat

Answer 18

watch file inside

Question 19

head

Answer 19

first 10 lines of the file

Question 20

tail

Answer 20

last 10 lines of the file

Question 21

tail -f

Answer 21

Monitor file editing

Question 22

^C

Answer 22

invoke control back

Question 23

grep

Answer 23

find inside the file

Question 24

less

Answer 24

open visible part of file

Question 25

man

Answer 25

open manual

Question 26

which

Answer 26

find where command execution file lies

Question 27

echo

Answer 27

show on screen

Question 28

$

Answer 28

before variables

Question 29

env

Answer 29

Show current session vars

Question 30

>

Answer 30

writing into a file

Answer 31

reading from the file

Question 32

sort

Answer 32

Sorting

Question 33

uniq

Answer 33

show unique only

Question 34

wc

Answer 34

word count (lines/words/symbols)

Question 35

!!

Answer 35

repeat the last command

Question 36

!555

Answer 36

repeat command number 555

Question 37

history

Answer 37

show history of commands

Question 38

~/.bash_history

Answer 38

Where the history lives

Question 39

alias ***=’command’

Answer 39

Set alias

Question 40

unalias ***

Answer 40

remove alias

Question 41

type ***

Answer 41

show what is it