command-line-basics-Q&A

Question 1

What is a CLI?

Answer 1

command-line interfaces

Question 2

What is a GUI?

Answer 2

graphical user interface

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: is an interface to the on-line reference manuals.
• Cat: Concatenate FILE(s) to standard output. (gives output in terminal)
• LS: List information about the FILEs (the current directory by default).
• PWD: Print the full filename of the current working directory.
• Echo: Echo the STRING(s) to standard output. (takes a string and outputs it to the terminal)
• Touch: Update the access and modification times of each FILE to the current time.
• MKdir: Create the DIRECTORY(ies), if they do not already exist.
• MV: Rename SOURCE to DEST, or move SOURCE(s) to DIRECTORY.
• RM: removes each specified file.
• CP: Copy SOURCE to DEST, or multiple
  SOURCE(s) to DIRECTORY.

Question 4

What are the three virtues of a great programmer?