Messed up with my 'Macintosh HD' Sharing & Permission

Hi there, it will sooo highly appreciated if someone could REALLY help me one this one. I accidentally messed up my setting in my HDD. I went to my HDD and right click then I went to Get Info > Sharing & Pemission > Everyone > No Access (Originally was Read & Write). Now I can't boot in to my computer. Yeah, it is a silly mistakes but I'm still considered NEW to Mac.
Here a screenshot for this matter. (Took from other machine)

I believe you can Boot into the Recovery Disk, from the Diskutility you can reset the Permessions. Hope this helps a bit
Joseph

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