plotting – How to draw 3D sets in Mathematica given inqualities

I would like to draw a 3D set ($E$) given the following conditions:

$E={(x, y, z)inmathbb R^3: x, y, z in (0, 1), x+2y-1leq z}$

I have seen in the Mathematica documentation that there are several functions to draw things like that (e.g Plot3D or ParametricPlot3D). All these function does not meet my needs since I need to draw the intersection between the cube $(0, 1)^3$ and the semi-space $x, +2y-1leq z$.

Do you know a function that can plot a set like this?

Thank you in advance.