Re: Difference between single and double quotes for parallel?

[Maciej Pilichowski]

Hello,

On 12/16/2010 12:26 AM, Ole Tange wrote:
> On Wed, Dec 15, 2010 at 11:25 AM, Maciej Pilichowski
> <pilichowski.maciej@gmail.com>  wrote:
>
> >   In order to preserve the space within some argument, normally you would
> > enclose it in double quotes.
>
> Start by reading the man page on QUOTING.

There is a slight problem, because I read the EXAMPLES section too, and 
one section says one thing, and the second another.

EXAMPLES:
Another solution is to quote the whole command:
parallel "zcat {} >{.}" ::: *.gz

QUOTING:
For example this will not work:
ls *.gz | parallel -q "zcat {} >{.}"

You repeated the quoting statement here, so I guess the latter is true.



Thank you for all explanations and help, I will test them one by one, to 
get some experience in general.

> Please provide a full example and explanation of what it does and what
> you expected it to do. It is unclear what you mean by the above. This
> works as expected:
>
> $ FN=a
> $ echo 1 | parallel echo $FN
> # prints a 1

I would like to call composed command. So something like this

FN=something with space
cat my_file | parallel script1 "{}" "$FN" \; script2 "{}" "$FN"

Both script1 and script2 should get 2 arguments, the second should be 
"something with space" (first script1 should be executed, when it 
finishes -- script2).

Remark: I am not fully sure, if I did all the quoting correctly here 
because I didn't do my "homework" (see above).

Kind regards,