Crude DNS cacher to reduce number of upstream lookups

dns_cacher

#!/bin/bash

# Requires install of dnsutils package. Can be added to a crontab with root permissions
# for however often you want to refresh the cached IP.

host="pfclient-upload.planefinder.net"

ipaddr=$(dig +short "$host" | awk '{ print ; exit }')
grep -v "$host" /etc/hosts | tee /etc/hosts
echo "$ipaddr	$host" | tee -a /etc/hosts