When looking for any Harvest related process, it can be complicated because there are 4 different types of processes for which to look. Here's how you can do it with a single command.
CA Harvest SCM all versions and platforms
In Linux or Unix you would grep for multiple strings, like this:
ps -ef | grep 'bkrd\|hserver\|rtserver\|agntd'
In Windows Power-Shell you can accomplish the same thing with this command:
tasklist | select-string -pattern "bkrd|hserver|rtserver|agntd"