a *very* odd question especially for me. Janina Sajka <janina at rednote.net> wrote

[Henry Yen]

With the bash shell, at least, use single-quotes (unshifted double-quote
key on US keyboards) to prevent processing anything inside a
single-quoted string (except for another single quote). All of your
examples here are more easily handled that way. In general,
there's no restriction on mixing single-quoted strings and
double-quoted strings (bash will still do substitutions in the latter).

echo 'Hello!' 'Hello!!' 'Hello!?' 'my userid is'" $LOGNAME today."

On Thu, Jul 30, 2015 at 08:10:01AM -0500, Tim Chase wrote:
> One of the biggest offenders I find is the exclamation point.  For
> example, try the following:
> 
>   echo "Hello!"
>   echo "Hello!!"
> 
> (note that the second one has two exclamation points).  The result
> replaces the "!!" with the previous command, so you end up with
> output of
> 
>   Helloecho Hello!

-- 
Henry Yen                                       Aegis Information Systems, Inc.
Senior Systems Programmer                       Hicksville, New York