I don't think you can. All you have to do is not die and play for a long time on the server that you want to get the faction power on.
I assume you're talking about a faction invite. the command is /f join <faction>
It must have the factions plugin. The command it /f create name
The command varies from server plugin to server plugin cause some people make they're one plugins
To answer a faction invite just do /f join <faction name>
You use /f leave [faction name]
It depends on the Minecraft server and what plugin the server is using for factions, sometimes typing "/help" on a server will give you the command syntax (what is required for each command). Alternatively if you know what mod they use, Google search for the plugin/mod and find out.
If you are in a faction, and want to teleport to your faction home, just type /f home.
add them to your faction with /f join <faction name>
You can create a door by doing the following: ("Plank of wood" is "pow") in the 3x3 crafting square: pow;pow;nothing pow;pow;nothing pow;pow;nothing then you right-click on the ground where you want the door to be. Right-click the door to open/close it you should use minecraft wiki, it would answer all your questions
Press T
You will need to the faction plugin for bukkit once running then do in the chat /f create {name of faction here}
You kill mobs and players