File commands

Question 1

cd ~

Answer 1

change directory to your home

Question 2

cd ~luis

Answer 2

change directory to sonali’shome

Question 3

cd ..

Answer 3

change directory to upper directory

Question 4

cd /

Answer 4

change directory to root

Question 5

What are tabs used for?

Answer 5

to finish file names

Question 6

ctl-d

Answer 6

delete turn off terminal

Question 7

date

Answer 7

date and time

Question 8

who am i

Answer 8

Who’s using the machine

Question 9

‘who’ ‘whoami’

Answer 9

Who’s using the machine

Question 10

‘ls’

Answer 10

list the files

Question 11

‘-a’

Answer 11

option means ‘list all’, will show hidden files as wel

Question 12

all filenames starting with a period are….

Answer 12

Hidden files

Question 13

‘-l’, ‘–color’ ‘-t’ ‘-lt’ ‘-la’

Answer 13

other commands

Question 14

‘cat’ or ‘pr’

Answer 14

Printing File

Question 15

‘mv’

Answer 15

means rename or move

Question 16

‘cp’

Answer 16

means copy

Question 17

mkdir

Answer 17

making new directories

Question 18

rm

Answer 18

removing a file

Question 19

corresponds to ‘rm’: ‘rm-i’

Answer 19

will ask “are you sure that you want to delete”

Question 20

corresponds to ‘rm’; ‘rm -r’

Answer 20

will do everything recursivily, ‘-f’ force

Question 21

rmdir

Answer 21

remove directory

Question 22

ed

Answer 22

text editor

Question 23

a

Answer 23

add text

Question 24

.

Answer 24

stop adding text

Question 25

w filename

Answer 25

add name to the file

Question 26

q

Answer 26

exit

Question 27

wc

Answer 27

word-counting

Question 28

grep or ‘-v’

Answer 28

search files

Question 29

sort (‘-r’, ‘-n’, ‘-nr’, ‘-f’)

Answer 29

sort in alphabetical order

Question 30

chmod 755

Answer 30

rwx rwx rwx

Question 31

chmod a+r

Answer 31

(u/g/a) ( +/ -) (r/w/x)

Question 32

file

Answer 32

utility tells type of file like text, word or pdf

Question 33

what does this do? ‘grep wordpath/filename’

Answer 33

grep find a word in a file

Question 34

’ | ‘

Answer 34

redirect output of one command to other command

Question 35

what do these key words show? ‘more’ or ‘less’

Answer 35

shows files pagewise

Question 36

‘find’ and ‘locate’

Answer 36

utility help to find a file by filename

Question 37

what does this line do? ‘find –r path –name filename’

Answer 37

will find the location of file in given path. Useful command as we can use wild card pattern