Code: › #!/bin/bash

blacklist="/opt/bind/blacklist.txt"
tmpfile=$(mktemp /tmp/dnsbl.XXXXXXXXXX)
bkpfile=$(mktemp /opt/bind/dnsbk.XXXXXXXXXX)

minvlist=$(mktemp /tmp/minvls.XXXXXXXXXX) || exit 1
wget -q https://www.financnasprava.sk/sk/infoservis/priklady-hazardne-hry -O $minvlist
actualfile=`cat $minvlist | grep 'Zoznam zak' | sed -n 's/.*href="\([^"]*\).*/\1/p'`
wget -q https://www.financnasprava.sk/$actualfile

if [ ! -f $blacklist ]; then
 touch $blacklist
fi

actualfile=$(ls *.pdf)
 if [ -e *.pdf ]; then
   pdftotext $actualfile $tmpfile
   cat $tmpfile | grep http | sed 's~.*http[s]*://~~g' > blexport.txt
       if [ "$(md5sum $blacklist | cut -d" " -f1)" != "$(md5sum blexport.txt | cut -d" " -f1)" ]; then
         cp blacklist.txt $bkpfile
         cp blexport.txt $blacklist
          rm /etc/bind/named.zones.bl 2> /dev/null
         for bl_list in $(cat /opt/bind/blacklist.txt);
          do echo "zone "\"$bl_list"\" { type master; file \"/etc/bind/db.blacklist\"; allow-transfer { slaves; }; notify yes; };" >> /etc/bind/named.zones.bl
         done
          logger -t dns-blacklist "Updating... backup of $blacklist is in $bkpfile."
            service bind9 restart
       fi
 fi

rm -f $minvlist 2> /dev/null
rm *.pdf 2> /dev/null
rm *.htm* 2> /dev/null
rm priklady* 2> /dev/null
rm temp.txt 2> /dev/null
rm -f $tmpfile 2> /dev/null
rm -f $bkpfile 2> /dev/null

Code: ›
#!/bin/bash

master=x.x.x.x
myzonesfile="/etc/bind/named.zones"
remotehost=$master
remoteuser=root

tmpfile=$(mktemp)
bkpfile=$(mktemp)

logger -t dns-zonesync "starting bind zone sync."
for zone in $(ssh $remoteuser@$remotehost "cat /etc/bind/named.zones /etc/bind/named.zones.ptr /etc/bind/named.zones.bl" | cut -d' ' -f2 | tr -d \"); do
  echo "zone \"$zone\" {" >>$tmpfile
  echo "  type slave;" >>$tmpfile
  echo "  masters { $master; };" >>$tmpfile
  echo "  file \"zones/$zone.bdb\";" >>$tmpfile
  echo "};" >>$tmpfile
  echo >>$tmpfile
done
if [ ! -e $myzonesfile ]; then
  cp $tmpfile $myzonesfile
  chown bind:bind $myzonesfile
  service bind9 restart
  logger -t dns-zonesync "first run: generated $myzonesfile."
fi
if [ "$(md5sum $myzonesfile | cut -d" " -f1)" != "$(md5sum $tmpfile | cut -d" " -f1)" ]; then
  cp $myzonesfile $bkpfile
  cp $tmpfile $myzonesfile
        service bind9 restart
  logger -t dns-zonesync "done. backup of $myzonesfile is in $bkpfile."
fi

rm -f $tmpfile
rm -f $bkpfile
logger -t dns-zonesync "No changes detected."