Bash (Linux/Unix)

Question 1

pwd

Answer 1

print working directory

Question 2

hostname

Answer 2

my computer’s network name

Question 3

mkdir

Answer 3

make directory

Question 4

cd

Answer 4

change directory

Question 5

ls

Answer 5

list directory

Question 6

rmdir

Answer 6

remove directory

Question 7

pushd

Answer 7

push directory

(add directory to the stack)

don’t go to much into stacks at this point, come back to later

Question 8

popd

Answer 8

pop directory

(removed directory from the stack)

don’t go to much into stacks at this point, come back to later

Question 9

cp

Answer 9

copy file or directory

Question 10

mv

Answer 10

move file or directory

Question 11

less

Answer 11

allows users to view the content of a file or output in a scrollable manner.

It’s especially useful for reading large files or paginated command output without loading everything into memory at once.

Question 12

cat

Answer 12

print the whole file

Question 13

xargs

Answer 13

execute arguments

Question 14

find

Answer 14

find files

Question 15

man

Answer 15

read a manual page - documentation in linux

Question 16

apropos

Answer 16

find which manual page is appropriate

Question 17

env

Answer 17

look at your environment

Question 18

echo

Answer 18

display a string or text to the terminal

frequently used utility for printing output, debugging scripts, and creating text files.

Question 19

export

Answer 19

export/set a new environmental variable

Question 20

exit

Answer 20

exit the shell

Question 21

sudo

Answer 21

“super user do” runs a command with elevated privileges

Question 22

(reverse card)

print working directory

Answer 22

pwd

Question 23

(reverse card)

my computer’s network name

Answer 23

hostname

Question 24

(reverse card)

make directory

Answer 24

mkdir

Question 25

# (reverse card) change directory

Answer 25

cd

Question 26

# (reverse card) list directory

Answer 26

ls

Question 27

# (reverse card) remove directory

Answer 27

rmdir

Question 28

# (reverse card) push directory (add directory to the stack) don't go to much into stacks at this point, come back to later

Answer 28

pushd

Question 29

# (reverse card) pop directory (removed directory from the stack) don't go to much into stacks at this point, come back to later

Answer 29

popd

Question 30

# (reverse card) copy file or directory

Answer 30

cp

Question 31

# (reverse card) move file or directory

Answer 31

mv

Question 32

# (reverse card) page through a file

Answer 32

less

Question 33

# (reverse card) print the whole file

Answer 33

cat

Question 34

# (reverse card) execute arguments

Answer 34

xargs

Question 35

# (reverse card) find files

Answer 35

find

Question 36

# (reverse card) read a manual page

Answer 36

man

Question 37

# (reverse card) find which manual page is appropriate

Answer 37

apropos

Question 38

# (reverse card) look at your environment

Answer 38

env

Question 39

# (reverse card) print some arguments

Answer 39

echo

Question 40

# (reverse card) export/set a new environmental variable

Answer 40

export

Question 41

# (reverse card) exit the shell

Answer 41

exit

Question 42

# (reverse card) "super user do" runs a command with elevated privileges

Answer 42

sudo

Question 43

ls -a

Answer 43

list files and hidden files .

Question 44

ls -F

Answer 44

list file type / Directory @ Link * Executable

Question 45

chmod (def & how to use)

Answer 45

change mode command - changes user permissions chmod [ugoa] [+-=] [rwx] command + user category + add,subb,set + permission

Question 46

chgrp

Answer 46

change the file's group

Question 47

umask

Answer 47

file creation mask command - sets the default permissions for a file