From: bwv549 Date: 2006-08-10T04:55:11+09:00 Subject: Re: access built-in shell commands like 'history' or 'fc' > Could it be that Ruby is using a different shell than you are used to? > I think it uses /bin/sh by default (not sure). Perhaps that is part of it. However, on this suggestion, I entered the suggested shell (/bin/sh). However, the behavior hasn't changed, although the 'history' command works fine in this shell. Just for reference, this is what I get when checking what this shell is: % /bin/sh --version GNU bash, version 3.1.17(1)-release (i486-pc-linux-gnu) Copyright (C) 2005 Free Software Foundation, Inc. I'm on Ubuntu 6.X, just for reference. Thanks