Command Line

Question 0

Whats is another term for my computer’s network name?

Answer 0

Hostname

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

popd

Answer 7

Pop directory

Question 8

cp

Answer 8

Copy a file or directory

Question 9

mv

Answer 9

Move a file or directory/renaming them

Question 10

less

Answer 10

Page through a file

Question 11

cat

Answer 11

Print the whole file

Question 12

xargs

Answer 12

Execute arguments

Question 13

find

Answer 13

Find files.

find -STARTDIR -name WILDCARD -print

Question 14

grep

Answer 14

Find things inside files

Question 15

man

Answer 15

Read a manual page

Question 16

apropos

Answer 16

Find what man page is appropriate.

Question 17

env

Answer 17

Look at your environment.

Question 18

echo

Answer 18

Print some arguments.

Question 19

export

Answer 19

Export/set a new environment variable.

Question 20

exit

Answer 20

Exit the shell.

Question 21

sudo

Answer 21

DANGER! Become super user root DANGER!

Question 22

chmod

Answer 22

Change permission modifiers.

Question 23

chown

Answer 23

Change ownership

Question 24

touch

Answer 24

Creates a new file

Question 25

$|$

Answer 25

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

Question 26

$<$

Answer 26

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

Question 27

$>$

Answer 27

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

Question 28

$»$

Answer 28

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

Question 29

*

Answer 29

Matches anything in a wildcard like *.txt