With this OS icon ?
It seems you are looking at the command neofetch: https://github.com/dylanaraps/neofetch
which says:
Neofetch is a command-line system information tool written in bash 3.2+. Neofetch displays information about your operating system, software and hardware in an aesthetic and visually pleasing way.
Installation instructions seem to be here: https://github.com/dylanaraps/neofetch/wiki/Installation
Debian has a package named screenfetch which seems very similar; for other distributions, if not provided by the package manager, may be this page helps: http://tuxtweaks.com/2013/12/install-screenfetch-linux/
