An open-source text editor which is typically run from the command line. A minimal version is included in Ubuntu by default but the full version is available in repositories. Questions should relate to using Vim on Ubuntu.
Vim is a configurable text editor most commonly used as a command line application. It is free open-source software in active development, and the full version is available in Ubuntu repositories. A minimal version is installed by default.
Resources:
Helpful question for beginners: http://askubuntu.com/questions/252760/how-do-i-save-files-edited-with-vim