Toppo is beginner level CTF and is available at VulnHub. Getting the first shell and then root, both are very easy. Throughout the walkthrough, I'll be using Parrot Security OS. Turn on the machine and

Basic Pentesting 1 is available at VulnHub. Its difficulty level is "Easy". This machine has no flags and sadly lacks CTF flavor. It contains multiple Remote and Privilege Escalation Vulnerabilities.