A 'How to' guide to sharpening a knife the traditional way.

[snock]

If you haven't a handy leather belt, stropping the blade against denim jeans can work well, too.

Regards,
MikB

Mik's right!
I was shown by Dave Budd, a professional knife maker, that even your skin can revive a sharp edge if you stroke your thumb across the edge [not along it!] at 90 degrees to it.
This isn't recommended unless you've enough experience and common sense to ensure your safety.

For the inexperienced user, a belt will work perfectly.