There is a file inside your server 's folder is called : "Ops" Open it with notepad (it should be txt file) and then type your username in it and save changes, then to change the map go to "yourserverfolder\world" Then delete all the files and then copy the new map 's files and paste it in "Yourserverfolder/world" and done
Ok you need GroupManager and if you haven't done so get Essentials Plugin. CraftBukkit you will need. You will also need to install a plugin that allows you to make a protected area by simply placing a certain block. You will probably want Lockette or ChestShop or Factions. Those are popular plugins. I hope this helped! (Or gave you an Idea on what to do.)
There is a file inside your server 's folder is called : "Ops" Open it with notepad (it should be txt file) and then type your username in it and save changes, then to change the map go to "yourserverfolder\world" Then delete all the files and then copy the new map 's files and paste it in "Yourserverfolder/world" and done
Reply if it works
thanks, that worked.