Can you lay ceramic tile in a trailer house over linoleum?

No because of a few of reasons. Most manufactured homes have particle board subfloors which are completely incompatible with installing ceramic flooring. In the rare event your floor doesn't have particle board and does have plywood, the house must be on a foundation. If it is in a park, it is usually held in place with tie downs. The home moves to much for the floor to be successful. Finally linoleum isn't an acceptable subfloor. You need a total of 1 1/4" of subflooring when complete. Assuming you have 3/4" plywood, you would need to add 1/2" cement board. The linoleum can stay, but the tile cannot be adhered directly to it.