How do you give someone an admin role in a faction on minecraft?

If u mean factions then all u do is: /f admin . They have to be in your faction though. If u didn't mean that then sorry.

If you mean to give them the same access to the game as you do, like, letting them break blocks, build, make things, etc, then whoever is hosting the server has to add the person's "user name" to the "op's" list file. It should be in the same folder as your server file or main folder with the minecraft app in it. There should be 4 or 5 other simple text (.txt) files like, white-list, banned-player, server.log, etc, that the Minecraft server app makes when it first starts up.

Basically an Admin is always the one who host's the server, where as OP's have 90 percent of the "rights" as the Admin.

Typing this in the game will do the same thing also. An Admin has to be the one to type it tho, (or someone who is also an OP)

/op ---- turns a player into an op (an example, /op Creeperkiller )

/deop --- removes op status from a player

Look up Minecraft server wiki for more information online.