update-hosts.sh

#!/bin/bash

rootcheck() {
  if [[ $UID -ne 0 ]]; then
    echo "Please run this script as root"
    exit 1
  fi
}
rootcheck

temphosts1=$(mktemp)
temphosts2=$(mktemp)

wget -nv -O - http://someonewhocares.org/hosts/hosts >> $temphosts1
wget -nv -O - http://winhelp2002.mvps.org/hosts.txt >> $temphosts1
wget -nv -O - http://www.malwaredomainlist.com/hostslist/hosts.txt >> $temphosts1
wget -nv -O - http://adblock.gjtech.net/?format=hostfile >> $temphosts1
wget -nv -O - http://hosts-file.net/ad_servers.asp >> $temphosts1
wget -nv -O - "http://pgl.yoyo.org/adservers/serverlist.php?hostformat=hosts&showintro=0&mimetype=plaintext" >> $temphosts1

# This part gets pretty nasty :/

cp $temphosts1 $temphosts2

sed -e 's/\r//' -e '/^127.0.0.1/!d' -e '/localhost/d' -e 's/127.0.0.1/0.0.0.0/' -e 's/ \+/\t/' -e 's/#.*$//' -e 's/[ \t]*$//' < $temphosts1 | sort -u > temp1
sed -e 's/\r//' -e '/^127.0.0.1/!d' -e '/localhost/d' -e 's/127.0.0.1/::1/' -e 's/ \+/\t/' -e 's/#.*$//' -e 's/[ \t]*$//' < $temphosts2 | sort -u > temp2
cat temp1 temp2 >> /etc/hosts
rm $temphosts1 $temphosts2 temp1 temp2

sed -i '/127.0.0.1 localhost/d' /etc/hosts
sed -i '/::1 localhost/d' /etc/hosts

echo "127.0.0.1 $HOSTNAME
::1 $HOSTNAME" | cat - /etc/hosts >> temp && mv temp /etc/hosts

sudo ./ignore.sh

sed -i '/# Last updated on /d' /etc/hosts

echo "# Last updated on $(date)" | cat - /etc/hosts >> temp && mv temp /etc/hosts