travesuncensored

I have recently made a server that me and my friends are planning to play on, but I'm trying to get everything ready. When I couldn't figure out why I couldn't use commands I remembered that I had to make myself an admin. The only problem with this is whenever I enter "/op [my username]" nothing happens. I don't know if somethings wrong with the server or my computer or what. If you know how I can fix this problem please tell me.