#!/bin/sh
n=1000
rm -f foo.tmp
while test $n != 0
do
echo "tag_$n item_$n on" >>foo.tmp
n=`expr $n - 1`
done
  dialog \
    --backtitle "Back Title" \
    --no-shadow \
    --separate-output \
    --checklist "Title"\
      19 60 12 \
      `cat foo.tmp` 2> output_file