Question: what is the difference between top and htop?
Answer: In 'htop' you can scroll the list vertically and horizontally to see all processes and complete command lines. ... In 'htop' you don't need to type the process number or the priority value to renice a process, in 'top' you do. 'htop' supports mouse operation, 'top' doesn't. 'top' is older, hence, more used and tested.