(reference: https://www.thegeekstuff.com/2011/09/linux-htop-examples/)

Cheatsheet:

• Display Processes Sorted by any htop Output Column: [F6] or [>]
• Kill a process: [k]
• Display Only Processes of a Single User: [u]
• Display Processes in Tree View: [t]
• Customize the output (including de columns you want to see for processes): [S]
• Strace a process (useful to see the system calls invoked by it): Select the process, then [s]
• Display all open files by a process: Select the process, then [l]
• Follow a process (to see its behavior compared to the others): Select the process, then [F]
• Search for a process: [/]