A few things, you can lower the resolution of grub to make the console look
bigger I guess, or you can use grub-mkfont to generate a larger font and set
that as your grub font. From the sounds of it you're also having issue with the
tty font which I googled and found that yjou could reconfigure the font size (I
don't know what distro you're using, but there's stuff on Ask Ubuntu).
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