Command-Line basics

Question 1

What is CLI?

Answer 1

command-line interface / processor: uses a command-line interface to receive commands from a user in a form of lines of texts.

Question 2

What is GUI?

Answer 2

graphical user interface: aimed at consumers of technology (end-users)

Question 3

man

Answer 3

pulls up manual

Question 4

cat

Answer 4

concat and prints files

Question 5

ls

Answer 5

lists files in directory

Question 6

pwd

Answer 6

prints working directory

Question 7

echo

Answer 7

displays lines of text

Question 8

touch

Answer 8

change file timestamps.
Updates the access and modification times of each FILE to the current time.

Question 9

mv

Answer 9

moves and renames files

Rename SOURCE or DEST or move SOURCE(s) to DIRECTORY

Question 9

mkdir

Answer 9

make directory

Question 10

rm

Answer 10

removes files or directories

Question 11

cp

Answer 11

copy files or directories

Question 12

history

Answer 12

the History Library keeps track of the user’s command input lines, associates arbitrary data with each line, and utilizes info from previous lines in composing new ones.