Commands

Question 1

How to see your path to the root directory

Answer 1

pwd

Question 2

delete file1.txt

Answer 2

rm file1.txt

Question 3

move file1.txt

Answer 3

mv file1.txt file2.txt

Question 4

create a dir1

Answer 4

mkdir dir1

Question 5

delete empty directory dir1

Answer 5

rm -d dir1

Question 6

delete populated dir2

Answer 6

rm -r

Question 7

change to dir1

Answer 7

cd dir1

Question 8

see all processes running

Answer 8

ps

Question 9

delete a single running process

Answer 9

kill [PID]

Question 10

delete all running processes called Run_Prog

Answer 10

killall Run_Prog

Question 11

create empty text file1

Answer 11

touch file1.txt

Question 12

list contents of current directory

Answer 12

ls

Question 13

what does “echo” do?

Answer 13

prints to the terminal

Question 14

how to create and move in to ex1.txt

Answer 14

vi ex1.txt

Question 15

edit in vi

Answer 15

press “i”

Question 16

get out of edit mode in vi

Answer 16

esc

Question 17

save in vi

Answer 17

:w

Question 18

quit in vi

Answer 18

:q

Question 19

for ping, the _ the number, the better the connection

Answer 19

lower

Question 20

clear the console

Answer 20

clear

Question 21

how to display the last 5 commands used

Answer 21

history-5

Question 22

how to find how ls work

Answer 22

whatis ls

Question 23

how to find out where python program is located

Answer 23

which python

Question 24

how to check current memory usage

Answer 24

top

Question 25

save and quit in vi

Answer 25

:x

Question 26

what is a kernal?

Answer 26

central component of an operating system that manages operations of computer and hardware.

Question 27

what are the 3 main parts of a Unix OS?

Answer 27

the kernel, the shell, and user commands and applications

Question 28

what order do these go in in Unix: Shell, app, kernel, hardware?

Answer 28

app - shell - kernel - hardware

Question 29

What is the DSN

Answer 29

Deep Space Network

Question 30

Where are the antennas for the DSN?

Answer 30

• Mojave desert
• outside Madrid Spain
• outside Canberra Australia

Question 31

If a spacecraft is past the _, the DSN is the only practical way to contact it

Answer 31

Moon

Question 32

What is the dark room?

Answer 32

The control center for the DSN

Question 33

_ _ get passed around at mission critical events

Answer 33

Lucky peanuts

Question 34

The darkroom is called the _ of the _

Answer 34

• center
• universe

Question 35

how to change back to root directory in one command

Answer 35

cd ~

Question 36

move file1.txt to directory [dir2]

Answer 36

mv file1.txt /dir2