Go into the command prompt and do /op <yourusername>
Go to where you saved all your server properties, open the Ops.txt folder, put your name, then press save. You should be an op. Or use the command /op yourname. Then it will op you.
lavacraft.net
If its not your server you can not, the server owner only can. If you have your own server, go into the console of the server and type in /op YourMinecraftUsername
It depends on the server op's but if its your single player server no.
You need to be an admin or an op
If you have access to the server console (command prompt), type in the command op (I would type op Andrio).If you don't, ask someone who is already an op to do this.
If your using a regular server, and if you are an op, just type /op (the player's name). If you aren't an op, go into the server files, open the op file, and type in your and you're friend's usernames.
You have to be an op. Then you use /gamemode [Playername] 0.
Assuming that you are on a Server... You go to the console, and do "/op USERNAME" this will automatically OP the usernamed player. IF you are asking how to hack yourself OP and cheat on a Server, or something... There is no way to do this.
To make blocks destructible u have to be an op of the server
You can not opp yourself, so to op be opped in a server that's not yours, you have to be opped by an opped person to be opped.
No but they can make you an op. Would you like to join my server? If you do visit these websites minecraft-cliffside-server.webs.com, cliffside-forums.webs.com