I use putty from windows7 to an ubuntu web server and the options in the attached are confusing to me. I have been told to use keyboard function keys R6 but would like to know what they mean and why to pick one over the other.
The choices (as shown in the screenshot) are:
1. ESC, 2. Linux, 3. XtermR6, 4. VT400, 5. VT100, 6. SCO