Messed-up URL for blog

I was trying to move my wp to another folder, so I changed the URL. However, my whole system got totally fubared. I have everything back in its original place, but since the URL it is trying to access got moved, I can’t login. Anyone know what the file name is in my shell where I can re-adjust the URL it is trying to reference for my wp database? I appreciate any help anyone can give.