Retrieve CPU usage and memory usage of a single process on Linux?

Question

I want to get my CPU and memory usage of the single process on Linux - I know to use the PID. Hopefully, I can get it every second and write it to the CSV using a 'watch' command. What command can I use to get some information from my Linux command-line?

Answer 1

Use the command:

ps -p <pid> -o %cpu,%mem,cmd

(You can leave off "cmd" but that might help debug).

Note that gives average CPU usage of this process over time it has been running.

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