Command Line

Question 1

terminal

Answer 1

an application which allows access to underlying shells

Question 2

Why Terminals?
1) More fine-grained, predictable, and direct control
2) Automation and programmability
3)

Answer 2

1) More fine-grained, predictable, and direct control
2) Automation and programmability
3) Common interface across operating systems

Question 3

Why Terminals?
1) More fine-grained, predictable, and direct control
2)
3) Common interface across operating systems

Answer 3

1) More fine-grained, predictable, and direct control
2) Automation and programmability
3) Common interface across operating systems

Question 4

Why Terminals?
1)
2) Automation and programmability
3) Common interface across operating systems

Answer 4

1) More fine-grained, predictable, and direct control
2) Automation and programmability
3) Common interface across operating systems

Question 5

Why Terminals?
1) M
2) A
3) C

Answer 5

1) More fine-grained, predictable, and direct control
2) Automation and programmability
3) Common interface across operating systems

Question 6

command line

Answer 6

a spot where commands are entered by the user for a given shell

Question 7

pwd

Answer 7

print working directory - where the command line is

Question 8

which ________

Answer 8

Find out where ________ (a command) is located on system

Question 9

echo ________

Answer 9

prints whatever _________ is in the terminal or adds __________ to a file

Question 10

What does this command do?
echo “A change to file_1.txt”»file_1.txt

Answer 10

This command added the line A change to file_1.txt to the file_1.txt file.

Question 11

What does this command do?
echo “Brown Fox Runs”

Answer 11

prints out “Brown Fox Runs” in the terminal

Question 12

What is the $PATH?

Answer 12

A environment variable that allows the system to search for a command in all directories defined by the variable

Question 13

typical $PATH directories:

Answer 13

/usr/bin
/bin
/usr/sbin
/sbin

Question 14

ls ________

Answer 14

display the contents of ____________ a directory or folder

Question 15

ls .

Answer 15

lists the contents of the current folder

Question 16

ls ..

Answer 16

lists the contents of one folder up

Question 17

cd __________

Answer 17

change directory to ___________

Question 18

cd ..

Answer 18

move one folder up

Question 19

mv

Answer 19

move or rename folders or files - (Destructive)

Question 20

mv old_name new_name

Answer 20

renames the file old_name to new_name

Question 21

mv ../file_to_move ./

Answer 21

moves file_to_move from one directory up into your current directory

Question 22

mv file_name/ ../

Answer 22

moves file_name one directory up

Question 23

mkdir __________

Answer 23

makes a new folder or multiple new folders

Question 24

rmdir __________

Answer 24

removes a empty folder or multiple empty folders (Destructive)

Question 25

touch __________

Answer 25

creates an empty file. Can also update a timestamp of the file

Question 26

cp

Answer 26

copies a file to a new location. can also copy entire directories.

Question 27

cp ../file_to_copy ./

Answer 27

copies file_to_copy from one directory up into your current directory

Question 28

rm

Answer 28

removes a file, directory, multiple file, or multiple directories (Destructive)

Question 29

rm remove_me

Answer 29

removes the file remove_me

Question 30

rm remove_me1 remove_me2

Answer 30

removes the files remove_me1 and remove_me2

Question 31

rm -r __________

Answer 31

removes a directory and all of it contents (very destructive)

Question 32

man __________

Answer 32

manual page for ___________(command) Press q to exit

Question 33

man cp

Answer 33

manual page for cp

Question 34

whatis _________

Answer 34

basic description of ____________

Question 35

What does the -l in ls -l do?

Answer 35

-l: This flag tells ls to show the output in long format, which includes additional information about each file or directory, such as its permissions, owner, size, and modification time.

Question 36

What does the -a in ls -a do?

Answer 36

-a: This flag tells ls to show all files, including hidden files (which are typically files whose names start with a dot).

Question 37

What does the -la in ls -la do?

Answer 37

It tells the system to apply both the -a and -l flags

Question 38

what does the . after a git command do?

Answer 38

A period (.) after a command is used as shorthand to refer to the current working directory. This is commonly used in commands that require a path argument, such as the git add command.

For example, if you run the command git add ., Git will stage all the changes in the current directory and its subdirectories for the next commit.

Question 39

What does echo $0 print?

Answer 39

The command “echo $0” is used to print the name of the current shell that is running. The “$0” represents the name of the currently running script or shell.

Question 40

What does echo $SHELL print?

Answer 40

The command “echo $SHELL” is used to print the absolute path of the current shell that is running. The “$SHELL” variable contains the path of the current shell interpreter that is being used by the user.

Question 41

What does echo $PATH print?

Answer 41

The command “echo $PATH” is used to print the list of directories that are currently in the search path for executable programs. The “$PATH” variable contains a colon-separated list of directories where the shell looks for commands when a user enters a command name.