How do I turn off command block notifications?

I'm playing Minecraft on my server (1.8) and I have command blocks set up to go in circles and do the same commands, but it keeps giving the notification of the commands happening. Is there a way of turning this off?

No

/gamerule commandBlockOutput false
The capitalisation does matter!

hello, I'm getting into Minecraft on the switch! Before I played on wii u any command tips?