How to set the history length in bash?

Anyone know how to increase bash's history length? I've done it before, I think it's a variable, but I can't figure it out today. Also, how do you show all of your shell variables? I know it can be done but I forget the command. ---------------------------------------------------- Jonathan Wilson System Administrator Cedar Creek Software http://www.cedarcreeksoftware.com Central Texas IT http://www.centraltexasit.com