Question 1

Show help (the manual)

Accepted Answer

man

Question 2

Show the manual page for the `ls` command

Accepted Answer

man ls

Question 3

Search for [word]

Accepted Answer

man -k [word]

Question 4

Find out where a command is

Accepted Answer

which

Question 5

Shows the location of the command `ls`

Accepted Answer

which ls

Question 6

Find help on any command

Accepted Answer

--help

Question 7

how quick help for the command `ls`

Accepted Answer

ls --help

Question 8

Stop the current program

Accepted Answer

Ctrl+C

Question 9

Quit the vi text editor without saving

Accepted Answer

:q!

Question 10

Exit the current login shell

Accepted Answer

logout

Question 11

Change your password

Accepted Answer

passwd

Question 12

Execute a command as a superuser

Accepted Answer

sudo

Question 13

Edit the file [file] (which only superusers have write access to)

Accepted Answer

sudo vi [file]

Question 14

Create an SSH connection (a terminal) to a server

Accepted Answer

ssh

Question 15

Opens an SSH connection to _email.com_ and tries to log in as user _user_

Accepted Answer

ssh user@email.com

Question 16

Change to your user home directory

Accepted Answer

cd

Question 17

Change directory to [folder]

Accepted Answer

cd [folder]

Question 18

Change to the parent directory (the directory above the current one)

Accepted Answer

cd ..

Question 19

List files in a directory

Accepted Answer

ls

Question 20

List files (including hidden files) and also show their permissions and who owns them

Accepted Answer

ls -al

Question 21

List files (including hidden), ordering by most recent at the bottom

Accepted Answer

ls -alrt

Question 22

Make/create a new directory

Accepted Answer

mkdir

Question 23

Make a directory called [folder]

Accepted Answer

mkdir [folder]

Question 24

Print current directory

Accepted Answer

pwd

Question 25

Copy files and directories

Accepted Answer

cp

Question 26

Copy the contents of the file `money.txt` into a file `money.bak`

Accepted Answer

cp money.txt money.bak

Question 27

Copy the directory [folder A] (and all of its contents) into [folder B]

Accepted Answer

cp -rp [folder A] [folder B]

Question 28

Delete files and directories

Accepted Answer

rm

Question 29

Delete the file [file]

Accepted Answer

rm [file]

Question 30

Delete the directory `songs` and all files in it, without prompting! (warning, use this with caution!)

Accepted Answer

rm -rf songs

Question 31

Print the contents of a file

Accepted Answer

cat

Question 32

Print the contents of [file]

Accepted Answer

cat [file]

Question 33

Change the permissions of a file or directory

Accepted Answer

chmod

Question 34

Grant all permissions on `myscript.sh` to the user, and execute-only to _group_ and _other_

Accepted Answer

chmod 755 myscript.sh

Question 35

Allow the user to execute `myscript.sh`, and perform no other changes

Accepted Answer

chmod u+x myscript.sh

Question 36

Change the owner and group of a file or directory

Accepted Answer

chown

Question 37

Change the owner to [user] and the group to [group] on the file [file]

Accepted Answer

chown [user]:[group] [file]

Question 38

Show the difference between two files

Accepted Answer

diff

Question 39

Print the differences between [file A] and [file B]

Accepted Answer

diff [file A] [file B]

Question 40

Show the type of a file

Accepted Answer

file

Question 41

Show the file type of [file]

Accepted Answer

file [file]

Question 42

Browse the contents of a file

Accepted Answer

less

Question 43

Show and scroll the file [file]. Press `q` to exit

Accepted Answer

less [file]

Question 44

Find files with names matching a pattern

Accepted Answer

locate

Question 45

Find the location of any file called [file]

Accepted Answer

locate [file]

Question 46

Print the last few lines of a file

Accepted Answer

tail

Question 47

Print end of file and follow new lines in file `server.log`

Accepted Answer

tail -f server.log

Question 48

Create a new file or update an existing one

Accepted Answer

touch

Question 49

Create an empty file called [file.ext]

Accepted Answer

touch [file.ext]

Question 50

An interactive file editor

Accepted Answer

nano

Question 51

Edit the file [file.txt] in _nano_

Accepted Answer

nano [file.txt]

Question 52

Save a file and then exit

Accepted Answer

Ctrl+O Ctrl+X

Question 53

An interactive file editor (Intermediate level)

Accepted Answer

vim

Question 54

Edit the file [file.txt] in _vim_

Accepted Answer

vim [file.txt]

Question 55

Install and manage packages in RHEL/Fedora

Accepted Answer

dnf

Question 56

Search the online <repositories> for a package named [package]

Accepted Answer

dnf search [package]

Question 57

Install a package called [package] from the online repositories

Accepted Answer

dnf install [package]

Question 58

List all packages installed on your system

Accepted Answer

dnf list installed

Question 59

Upgrade all packages on your system to the latest compatible versions

Accepted Answer

dnf upgrade

Question 60

Install and manage packages in Ubuntu

Accepted Answer

apt

Question 61

Install a package called [package] from the online repositories

Accepted Answer

sudo apt install [package]

Question 62

Uninstall the package called [package] from your system

Accepted Answer

sudo apt remove [package]

Question 63

Get a web page or API

Accepted Answer

curl

Question 64

Fetch the [website] page and print the contents

Accepted Answer

curl [website]

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