gnu tar checkpoint variable expansion

[Jay Hall]

>
> Try this:
>
> /usr/local/gtar-1.22/bin/tar -cf - ${WHATTOBACKUP} \
> 	--checkpoint-action='echo=Checkpoint #%u' \
> 	--checkpoint-action="exec=/usr/local/scripts/check_disk_usage.sh $ 
> {DIR}"
>
> The use of single quotes prohibits the expansion of environment
> variables. Use double qoutes instead.

Thanks Trond, this did the trick.

Jay