Command-Line

Question 1

What is a CLI?

Answer 1

command-line interface, it is to receive commands from a user in the form of lines of text it sets parameters for the environment, invoking executables and providing information to them as to what actions they are to perform.

Question 2

What is a GUI?

Answer 2

graphical user interface. form of user interface that allows users to interact with electronic devices through graphical icons and audio, typed command labels, or text navigation.

Question 3

Give at least one use case for each of the commands listed in this exercise.

man, cat, ls, pwd, echo, touch, mkdir, mv, rm, cp

Answer 3

man = get the manual, manual pager utils. an interface to the system ref. manual
cat = concatenate files and print on the standard output. can combine txt files
ls = list directory contents. can see if file/directory for the file
pwd = print name of current/working directory. know where you are in the directories. answers where am I?
echo = display a line of text. can add a line of text quickly. its essentially a console.log for terminal
touch = change file timestamps. 
mkdir = make directories. can create nested directories with -p
mv = move (rename) files. can easily move / rename files
rm = remove files/directories.
cp = copy files/directories

Question 4

What are the three virtues of a great programmer?

Answer 4

laziness, impatience, hubris