i cant enable command blocks on my realms server when i go to settings the command block button in shaded over and i dont know how to enable them im not sure if this is a bug or not but it says in the 1.7.10 update log that command blocks were re enabled but they werent for the server i was on
Did you check the Wiki?
http://minecraft.gamepedia.com/Command_Block
. In multiplayer, command blocks can only be edited successfully by operators in creative mode, and for command blocks to work at all the following values must be set in the server.properties file:
enable-command-block must be set to true
op-permission-level must be set to 2 or above (default is 4)