Commands

Question 0

hostname

Answer 0

My computer’s network name

Question 1

pwd

Answer 1

Print working directory

Question 2

mkdir

Answer 2

make directory

Question 3

cd

Answer 3

change directory

Question 4

ls

Answer 4

list directory

Question 5

rmdir

Answer 5

remove directory

Question 6

pushd

Answer 6

push directory

Question 7

cp

Answer 7

copy a file or directory

Question 8

mv

Answer 8

move a file or directory

Question 9

less

Answer 9

page through a file

Question 10

cat

Answer 10

print the whole file

Question 11

xargs

Answer 11

execute arguments

Question 12

find

Answer 12

find files

Question 13

grep

Answer 13

find things inside files

Question 14

man

Answer 14

read a manual page

Question 15

apropos

Answer 15

find what man page is appropriate

Question 16

env

Answer 16

look at your environment

Question 17

echo

Answer 17

print some arguments

Question 18

export

Answer 18

export/set a new environment variable

Question 19

exit

Answer 19

exit the shell

Question 20

sudo

Answer 20

DANGER! become super user root DANGER!

Question 21

chmod

Answer 21

change permission modifiers

Question 22

chown

Answer 22

change ownership

Question 23

popd

Answer 23

Pop directory

Question 25

touch

Answer 25

Makes empty file

Question 26

$|$

Answer 26

The | takes the output from the command on the left, and “pipes” it to the command on the right.

Question 27

$<$

Answer 27

The < will take and send the input from the file on the right to the program on the left.

Question 28

$>$

Answer 28

The > takes the output of the command on the left, then writes it to the file on the right.

Question 29

$»$

Answer 29

The&raquo_space; takes the output of the command on the left, then appends it to the file on the right.

Question 30

*

Answer 30

wildcard

Question 31

crtl + d

Answer 31

close file

Question 32

-i

Answer 32

ignore case with grep