How do I keep printline from wandering all over the place?

Do you mean that you touch your touchpad while writing with a laptop?
If this is the case, have you got an usb-mouse?

I use a usb mouse and do not touch my touchpad unless circumstances dictate

Ok, you can disable your touchpad (so it will not bother you while writing) if you already use an usb-mouse.
Go to System - Mouse . Then Touchpad tab, uncheck Activate Touchpad.

There is also a trick to disable the touchpad when a usb mouse is inserted but it needs to do some xorg.conf modifications
sudo gedit /etc/X11/xorg.conf

You got to locate in xorg.conf the section:
Section "InputDevice"
Identifier "Touchpad"
EndSection

if we add this line at the end of section
Section "InputDevice"
Identifier "Touchpad"
...
Option "SHMConfig" "on"
EndSection

and we make a file "/etc/udev/rules.d/01-touchpad.rules"
in which are wrote:
ACTION=="add", SUBSYSTEM=="input", ID_CLASS="mouse", RUN+="/usr/bin/synclient TouchpadOff=1"
ACTION=="remove", SUBSYSTEM=="input", ID_CLASS="mouse", RUN+="/usr/bin/synclient TouchpadOff=0"

and restart X, every time you connect a usb mouse it disable the touchpad and when disconnect usb mouse it enable touchpad

Pablito,
ourumps all over the place --- this is the problem. answer but the mouse is not the problem. Look at the typing on this page and how it j
Thank you for y

(Pablito, The above typing is a good example of what I am complaining about, jumbled-up, disorganized, irregular printing. The mouse is not the problem. It is like pushing a wet noodle as I type, the cursor on the print line has a mind of its own.

P.S. I disabled the touchpad in System.

With my crappy english and your "jumbled-up, disorganized, irregular printing", I don't understand a word.
What I am trying to say is that: While writting , if you touch the touchpad with the bottom -palm- of your hand, that provokes exactly that kind of behavior (you're describing) in the cursor.
So I am propossing to disable the Touchpad, so it does'nt interfiers-affects while you are writting. If you are already using a usb-mouse, the touchpad is useless so you can disable. (INSTRUCTIONS ABOVE)
Of course you can enable/disable at will, but you will need the mouse to do it.
Hope that helps

Pablito,

 This problem arises only in Linux and has yet never been encountered in Windows.

 The touchpad has been disabled and does not work.It was disabled six months ago when I bought this computer. I do not touch the launchpad with the palm of my hand. The tip of my fingers is all that touches the computer keyboard as I type. Therefore, the touchpad is not the problem, something else is

Can you help me any further?

Pablito, your English is good. That first paragraph is a good example of what I am trying to say about my problem with the cursor jumping all over the place --- I speak and type better English than that! (heh!)

Will close this out until next time ...