Note that you must define yscrollcommand=scroll.set in the Text widget, and configure the scrollbar using the line: scroll.config(command=eula.yview)
Here is your code, rewritten with one scrollbar:
# Import Tkinter
from Tkinter import *
# define master
master = Tk()
# Vertical (y) Scroll Bar
scroll = Scrollbar(master)
scroll.pack(side=RIGHT, fill=Y)
# Text Widget
eula = Text(master, wrap=NONE, yscrollcommand=scroll.set)
eula.insert("1.0", "text")
eula.pack(side="left")
# Configure the scrollbars
scroll.config(command=eula.yview)
mainloop()
Here is a Tkinter example with two scrollbars:
# Import Tkinter
from Tkinter import *
# define master
master = Tk()
# Horizontal (x) Scroll bar
xscrollbar = Scrollbar(master, orient=HORIZONTAL)
xscrollbar.pack(side=BOTTOM, fill=X)
# Vertical (y) Scroll Bar
yscrollbar = Scrollbar(master)
yscrollbar.pack(side=RIGHT, fill=Y)
# Text Widget
text = Text(master, wrap=NONE,
xscrollcommand=xscrollbar.set,
yscrollcommand=yscrollbar.set)
text.pack()
# Configure the scrollbars
xscrollbar.config(command=text.xview)
yscrollbar.config(command=text.yview)
# Run tkinter main loop
mainloop()