This song is in standard tuning E A D G. Its really easy, just play along and have some fun with it. This is my first tab so I might be wrong on some parts, but it sounds ok.

They call me Mr. Knowitall&#8230;&#8230;&#8230;&#8230;
Rift 1 (main rift)
 Slap it or strum it
G--------------------------
D-2--2-2-2-0-2-0-2-0-
A-1--1-1-1-0-1-0-1-0-
E-------------------------

On the 4th time Les does crazy little rifts, when I play I just make them up. 
Or if your not good at that, just play rift 1 over again.

Rift 2

G----------------------        X3
D-2-------------------
A-1-------------------
E--------2-1-0--------

G----------------------
D-2-------------------
A-1-------------------
E-----2-2-1-1-0------

Rift 3 (during guitar solo)

G--------2-------------------------2
D--------3-------------------------3
A---------------------------------
E-2-2------------2-2-2-2-2-----

Play along with the drums.

Rift 4 (heavy part)

G------------2------------------2
D------------2------------------3
A-------------------------------
E---0-0---------0-0-0-0-0----