Type top in a terminal to display Linux processes, which includes PID.
A user doesn't directly create processes themselves, instead processes are created anytime a program is run. So, short, but not entirely accurate answer: Do ANYTHING on Linux and you'll cause processes to be created and destroyed.
ps aux
ps top
It doesn't. ISO is a disk image format that is often used to distribute Linux and other CD images.
It's 0, but some of kernel processes run with nice from -2 to -4, sometimes even higher.
Many distributions have older disk images in their archives. Try there.
The ulimit parameter in Linux is set so the user can only use a set number of processes which is authorised by the server. The ulimit parameter can be changed accordingly if needed.
PS (see "man 1 PS") in Linux is a program that generally comes with the operating system that allows you to see information about the running processes. pstree is a program that lets you see the processes as a tree, to see which process started which other process, for example.
Download the ISO images from Linux Mint's website, and burn it to a DVD or a flash drive and boot from it. Once it boots in a live session, on the desktop there is a icon named "Install Linux Mint" and click on it. Then follow the instructions and you'll be on your way to install Linux Mint.
Linux allows full access to the source code. Windows does not. The command line has always proven useful when altering software. Windows differs from Linux in command line limitations as well. Linux provides a centralized location in which software and application can be controlled.
retina is connected to the nerve and the nerve sends the messages or images to the brain and the brain processes the images