#!/bin/sh ipset x test >/dev/null 2>&1 ipset n test hash:ip for x in `seq 0 255`; do for y in `seq 0 255`; do echo "a test 10.10.$x.$y" done done | ipset r ipset -t list > .foo diff .foo big_sort.terse ipset -s save > .foo diff .foo big_sort.saved ipset x test