nload - displays the current network usage - Linux Man Pages (1)
July 26, 2018 at 3:31:38 PM GMT+2 - permalink - - https://www.systutorials.com/docs/linux/man/1-nload/

dstat
September 29, 2015 at 11:18:04 AM GMT+2 * - permalink - - https://links.infomee.fr/shaare/qi1ILw

Using Top More Efficiently Linux article
January 11, 2013 at 9:29:43 AM GMT+1 - permalink - - http://www.linuxforums.org/articles/using-top-more-efficiently_89.html

Linux Toolkits: Understanding memory usage from top and htop
January 11, 2013 at 9:18:42 AM GMT+1 - permalink - - http://linuxtoolkit.blogspot.fr/2010/02/understanding-memory-usage-from-top-and.html