PE day 1 Bash

Question 1

What is typed to clear your terminal?

Answer 1

clear…duh

Question 2

What will give you a history of all the past commands you’ve typed in the shell?

Answer 2

history…also duh

Question 3

what command copies files/directories?

Answer 3

cp (copy)

Question 4

What shows your current working directory?

Answer 4

PWD (print working directory)

Question 5

To stop a process from executing in shell what command can you run?

Answer 5

ctl + c

Question 6

What keyboard command will do the same thing as hitting the up arrow?

Answer 6

ctl + p (as in previous)

Question 7

What keyboard command will do the same thing as hitting the down arrow

Answer 7

ctl + n (for Next)

Question 8

What command will allow you to simply escape out of a loop in progress?

Answer 8

break ( as in you need to break free)

Question 9

What would you run to kill a process using a specific PID? (the command before the PID)

Answer 9

kill -9 (don’t know why, look it up, but i remember it by using a 9mm ;)

Question 10

What is the alternate command for echo?

Answer 10

printf

Question 11

If I wanted to display the PID of the last executed command, what variable would I echo?

Answer 11

myapp& echo

Question 12

What command would show the last 5 lines of file1?

Answer 12

tail -5 file1

Question 13

What command would show the first 5 lines of file1?

Answer 13

head -5 file1

Question 14

If you wanted to find the process name from process id 8675, what command would you run?

Answer 14

ps -p 8675

Question 15

To change a file so that it can be an executable what command do you run?

Answer 15

chmod 777

Question 16

What command changes a directory?

Answer 16

cd (for change directory)

Question 17

hat command can you use to remove a file?

Answer 17

rm (for remove, you would then specify the file either by relative, absolute path or by filtering…careful with your wildcards)

Question 18

If you want to display the contents of file1, what command can you run?

Answer 18

Cat as in concCATenate….the commands “more” and “less” also work

Question 19

What command will show what users are currently logged in?

Answer 19

Who…as in “who is logged in right now?”

Question 20

What command will show you how long a system has been running?

Answer 20

runtime….makes sense