참고할 자료
https://wiki.debian.org/AptCLI
https://en.wikipedia.org/wiki/APT_(software)
https://help.ubuntu.com/lts/serverguide/apt.html

The difference between apt and apt-get
https://askubuntu.com/questions/445384/what-is-the-difference-between-apt-and-apt-get
https://www.google.com/search?q=the+difference+between+apt+and+apt-get&ie=utf-8&oe=utf-8