I'm sure our ancestors didn't have equipment; I seem to remember a small, very warm and dry attic over the kitchen where my grandparents, in the days before freezers, dried nuts and fruits.
The most practical way to do this is with a dehydrator. Instructions from one of the manufacturers is at Hillmark.
Hormel has a database about all kinds of foods with a wealth of information. They state: "Foods can be dehydated by placing whole or sliced items in the sun or by simply allowing them to air dry on open racks with screening or holes that permit heat and air to reach the outer surfaces of the item being dried. Electric dehydrators are available as appliances that are commonly used to air dry various foods, which are placed on circular drying racks that rotate around air currents to hasten the drying process...."