Re: what does this mean ?

; separates commands, a convenient way to write cleaner syntax.

So the following are the same:

sed '/^$/d;G'
sed '/^$/d; G'
sed -e '/^$/d' -e 'G'

--- In [email protected], Tim Chase <sed@...> wrote:
>
> On 2013-03-15 09:03, ishare wrote:
> >   sed '/^$/d;G'
> >    
> >   1. what is ^$ meaning ? 
> >   2. what is ; meaning?
> >   3. what is G meaning ?
> 
>  /^$/       # on completely blank lines
>  d          # delete them and start again with the next line
>  ;          # and (if we get here, it's not a blank line)
>  G          # append the (by default, blank) hold space
>             # to the current line.
> 
> So this should delete all empty lines in the input stream, and then
> doublespace the entire resulting data.
> 
> -tkc
>