Becoming an Admin in Unturned

To become an admin, you will need your SteamID64, which you can obtain here: https://steamid.io

Basic Mode

In Basic Mode, you enter your SteamID64 under Server Settings.
Then click on Save and restart the server.

Advanced Mode

In Advanced Mode, you need to add your SteamID64 to the Commands.dat file.

Find the line that says Owner and add the SteamID64 to it.

The line should look like this:
Owner 1234567890
Click on Save and restart the server.

Adding Additional Players as Admins

The easiest way to do this is to be connected to the server and have admin privileges.
Simply use the /Admin command. For example:
/Admin PlayerName
or
/Admin SteamID64
Replace PlayerName and SteamID64 with the name or SteamID64 of the player you want to make an admin.

Note: You can find a list of available admin commands HERE.