$ script --id="1.0.0.1 1.0.0.2 1.0.0.3"
  # split the resulting variable on spaces

$ cat >id.dat
1.0.0.1
1.0.0.2
1.0.0.3
$ script --id=@id.dat

##</code><code>##

Usage: script.pl [-abcde] [ip_address [ip_address ...]]

##</code><code>##

Usage: script.pl [-abcde] -f filename [ip_address [ip_address ...]]
Usage: script.pl [-abcde] filename [ip_address [ip_address ...]]