How do I put a bathroom cabinet on the wall?
Depends on your walls but there is no way to fit a cabinet without screwing into the wall. If you use a decent hammer drill with a suitable drill bit then it will work. Look at the attached link. If it’s a new house and you have plasterboard then there will be a cavity between the plasterboard and the wall. For that you need a special cavity plug which expands behind the plasterboard when the screw goes in. See second link. These are excellent and you can buy them from most DIY places like Homebase and B&Q. – They work well.