How do you update a server for minecraft 1.5?

To update a server you are going to need to download a server from the minecraft.net website. Then you are going to have to run the server to get all the required files for the server. If you want to keep the same map, go into the updated server's "Server properties" and change the world name to whatever the world file is called. Then save, drag the map folder into the place with all of the new server info, then run. This works for every major update.