This tutorial by nixCraft shows us how to use various commands to manage processes in FreeBSD and OS X.

Fig.02 ps command with flags

I‘m a new Unix system user. How can I manage process on a FreeBSD operating systems?

A process is nothing but an executing program on FreeBSD or Unix-like system. Each process on the system provides the resources needed to run a program such as vim or firefox. Each process has:

Tutorial details
Difficulty Easy (rss)
Root privileges Yes
Requirements FreeBSD or Unix-like os
Estimated completion time 10m
  1. A unique process identifier number (PID)
  2. A virtual address space
  3. A security context
  4. Open devices/handles, executable code
  5. Environment variables, priority and more.

In this quick tutorial, I will write about process management on a FreeBSD operating systems.

Full instructions here: http://www.cyberciti.biz/faq/howto-use-ps-kill-nice-killall-to-manage-processes-in-freebsd-unix/