How to monitor Memory utilization of the single process?

Question

How to monitor Memory and CPU usage of the single process by program/executable name(not PID);

Answer 1

Try this. if you want with program name

   mypid=`pidof programname` ; top -p $mypid

OR

     top -p `pidof programname`

Answer 2

To monitor one or more instances matching the name:

top -p$(pgrep <program> | tr '\n' ',' | head -c -1)

Use pgrep -f to search the whole command lines for matches.

(Works with htop too.)