Oh, it's a laptop.  Some laptops have a Fn key you need to depress for
the function keys to act as F1-F12.  It varies from laptop to laptop. 
Some let you choose function key behavior in the bios/uefi setup.  If
you've got a spare USB keyboard, try plugging it in and use Ctrl-Alt-F1
to see if the problem's with the laptop keyboard setting.

Edward Bartolo via Dng wrote:
> Dear All,
>
> My keyboard settings are fo rEnglish (UK) and this laptop cannot in
> any way be described as new. It has several years, and for most, is
> fit for replacement with something more powerful, shiny and new! I use
> terminals more than modern mouse clicks admirers: that means, it is a
> frustration for me to be denied access to them. Terminals are powerful
> tools.
>
> Thanks.
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