I've enabled an allowed list to stop randoms entering the server so if anyone has problems getting on just let me know.
Everyone should be op's as well so you all should be able to use the server commands. They can be handy if you need teleport when you get lost.
kick <player> removes a player from the server
ban <player> bans a player from the server
pardon <player> pardons a banned player so that they can connect again
ban-ip <ip> bans an IP address from the server
pardon-ip <ip> pardons a banned IP address so that they can connect again
op <player> turns a player into an op
deop <player> removes op status from a player
tp <player1> <player2> moves one player to the same location as another player
give <player> <id> [num] gives a player a resource
ell <player> <message> sends a private message to a player
stop gracefully stops the server
save-all forces a server-wide level save
save-off disables terrain saving (useful for backup scripts)
save-on re-enables terrain saving
list lists all currently connected players
say <message> broadcasts a message to all players
time <add|set> <amount> adds to or sets the world time (0-24000)
