Command Lines

Question 1

print working directory

Answer 1

pwd

Question 2

my computer’s network name

Answer 2

hostname

Question 3

Make directory

Answer 3

mkdir

Question 4

change directory

Answer 4

cd

Question 5

list directory

Answer 5

ls

Question 6

remove directory

Answer 6

rmdir

Question 7

push directory

Answer 7

pushd

Question 8

pop directory

Answer 8

popd

Question 9

copy a file or directory

Answer 9

cp

Question 10

move a file or directory

Answer 10

mv

Question 11

page through a file

Answer 11

less

Question 12

print the whole file

Answer 12

cat

Question 13

execute argument

Answer 13

xargs

Question 14

find files

Answer 14

find

Question 15

find things inside files

Answer 15

grep

Question 16

read a manual page

Answer 16

man

Question 17

find what man page is appropriate

Answer 17

apropos

Question 18

look at your environment

Answer 18

env

Question 19

print some arguments

you can use this command to write and overwrite data to a file using command line in terminal

Answer 19

echo

echo “hello you” test.txt

this will overwrite any existing data in file test.txt with text hello you.

Question 20

export/ set a new environment variable

Answer 20

export

Question 21

exit the shell

Answer 21

exit