Linux terminal

Question 1

ls

Answer 1

list directory contents

Question 2

pwd

Answer 2

shows current directory name (print working directory)

Question 3

mv

Answer 3

rename a file

Question 4

cp

Answer 4

copy a file and name new file

Question 5

rm

Answer 5

remove files
rm -r = remove directory

Question 6

chmod

Answer 6

change permissions for owner

Question 7

chown

Answer 7

change name of owner or name of group

Question 8

su / sudo

Answer 8

elevated rights command stands for (super user)

sudo = 1 time
su = super user for entire session

Question 9

apt-get

Answer 9

install or uninstall

Question 10

yum

Answer 10

install or uninstall on other versions of linux

Question 11

ip

Answer 11

network configuration

Question 12

df

Answer 12

disk free - shows free space avaliable

Question 13

grep

Answer 13

search text in a file

Question 14

ps

Answer 14

current process viewer (view all processes on system)

Question 15

top

Answer 15

view CPU, RAM, and resource utilization (linux version of task manager)

Question 16

find

Answer 16

find a file by name or extension

Question 17

dig

Answer 17

lookup info about domain names (shows ip addresses of website names)

Question 18

cat

Answer 18

concatenate (combined two files or just show both of them together)

Question 19

nano

Answer 19

default text editor

Question 20

man

Answer 20

display user manual