Re: sorry--this is my question

[Roman Rakus]

On 07/23/2011 02:17 PM, Joachim Schmitz wrote:
> Jan Schampera wrote:
> > On 22.07.2011 18:12, the mad doctor kaeding wrote:
> > > is this a bug?
> > >
> > > > echo goodbye\ cruel\ world\!
> > > goodbye cruel world!
> > > > echo "goodbye cruel world!"
> > > bash: !": event not found
> > > > echo "goodbye cruel world\!"
> > > goodbye cruel world\!
> >
> > No, this is a specific history expansion in interactive shells.
> >
> > Execute ''set +H'' and try again (it's disabled in non-interactive
> > shells).
>
> Or use single quotes:
>
> echo 'goodbye cruel world!'
>
> double quotes only prevent filename expansion, but allow 
> interpretation of other Shell meta-characters
Not true. Double qutes remove special meaning of characters except `$', 
`\', and, when  history  expansion  is enabled, `!'. Meta characters 
loses its special meaning.

Note: `!' is usual history expansion character, but can be a different 
character.

RR
> Bye, Jojo