BASH and YES or ECHO cannot send "!"

[wwp]

Hello Mike McCarty,


On Wed, 14 Dec 2005 11:45:37 -0600 Mike McCarty <mike.mccarty at sbcglobal.net> wrote:

> wwp wrote:
> > Hello jdow,
> > 
> > 
> > On Tue, 13 Dec 2005 21:41:52 -0800 "jdow" <jdow at earthlink.net> wrote:
> > 
> > 
> >>From: "Synister Syntax" <synistersyntaxlist at gmail.com>
> >>
> >>>echo "Hello World! "
> >>>
> >>>also works...
> >>>
> >>>    Just don't have !" on top of each other like that.  An extra
> >>>spcae should't get in the way?
> >>>Hope this adds to your research.
> >>
> >>Of coure, "!" is an annoyance. "&" can kill a machine.
> >>  echo this will destroy your machine & rm -rf /
> >>is not quite the same thing as
> >>  echo "This won't destroy your machine & rm -rf /"
> >>
> >>ALWAYS be careful about quoting when using special characters.
> > 
> > [snip]
> > 
> > The point would be for a (new) user to know that ! is a special one :-),
> > that's not trivial.
> 
> I'm hardly a "new" user of bash. I've used it since about 1994
> or so on HPUX, Solaris, and now Linux.
[snip]

Hmm sorry for this confusion, my remark was more general and not especially
dealing w/ your former post, and new was between (), just to point that the
sentence could even apply to new users. So let's consider how a bash newbie
would be confused to discover that a single ! between "" has a special
meaning :-). Of course, RTFM..



Regards,

-- 
wwp