Works for me, however I did forget to quote $x in original example.
[rich@deadrat ~/test]$ ls -l
total 0
-rw-rw-r-- 1 rich rich 0 Feb 13 09:19 blah blah.p
-rw-rw-r-- 1 rich rich 0 Feb 13 09:19 this is a test
[rich@deadrat ~/test]$ for x in *; do mv "$x" ${x// /_}; done
[rich@deadrat ~/test]$ ls -l
total 0
-rw-rw-r-- 1 rich rich 0 Feb 13 09:19 blah_blah.p
-rw-rw-r-- 1 rich rich 0 Feb 13 09:19 this_is_a_test
[rich@deadrat ~/test]$ bash --version
GNU bash, version 2.05.8(1)-release (i386-redhat-linux-gnu)
Copyright 2000 Free Software Foundation, Inc.
On Fri, 13 Feb 2004, Scott Taylor wrote:
> Date: Fri, 13 Feb 2004 08:33:33 -0800
> From: Scott Taylor <scott@xxxxxxxxxxxxxxx>
> To: linux-admin@xxxxxxxxxxxxxxx
> Subject: Re: Stupid spaces
>
> At 06:15 PM 02/12/2004, rich+ml@xxxxxxxxxxx wrote:
> >How about:
> >
> > for x in *; do mv $x ${x// /_}; done
>
> That's kinda what I was thinking, only problem with that is, the file named
> "blah blah.p" will cause an error as bash/sh/ksh will think it is two files.
> mv: cannot stat `blah': No such file or directory
> mv: cannot stat `blah.p': No such file or directory
>
> even tried using `ls -c1` same thing. Worse thing is I know I did this
> before, so long ago, maybe I used Perl after all. Hmm...
>
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