- MEDUXA: https://www3.gobiernodecanarias.org/educacion/cau_ce/servicios/web/noticias/mEDUXa-descargas
- swap: https://itsfoss.com/swap-size/
- xargs: http://systemadmin.es/2009/04/uso-de-xargs-herramientas-unix-ii
https://tutorialzine.com/2014/12/you-dont-need-icons-here-are-100-unicode-symbols-that-you-can-use