How can I install "apt" or "dpkg" on Ubuntu 20.04?

Question

I am renting a cloud server with Ubuntu 20.04. There is no GUI. I find that I need other utilities and the installation instructions I come across use either apt or dpkg. How can I acquire and install these?

Answer 1

These are core tools and they are installed by default with Ubuntu 20.04. Ubuntu is based on Debian and these are its core package maintenance tools:

• dpkg - package manager for Debian - it is a tool to install, build, remove and manage Debian packages. The primary and more user-friendly front-end for dpkg is aptitude(1).
• apt-get - package handling utility - it is the command-line tool for handling packages, and may be considered the user's "back-end" to other tools using the APT library. Several "front-end" interfaces exist, such as aptitude(8), synaptic(8) and wajig(1).
• apt - provides a high-level commandline interface for the package management system. It is intended as an end user interface and enables some options better suited for interactive usage by default compared to more specialized APT tools like apt-get(8) and apt-cache(8).
• snap - tool to interact with snaps. The snap command lets you install, configure, refresh and remove snaps. Snaps are packages that work across many different Linux distributions, enabling secure delivery and operation of the latest apps and utilities.