Posts Tagged ‘Linux’

When installing Oracle 11gR2 (11.2.0.1) on Centos Linux 6.2 64-bit, the Oracle installer will fail the package verification for the x86 packages, even if the required packages have been installed. This is because the installer cannot verify the newer versions of the packages. You can safely ignore the errors and continue with the installation.

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It’s always handy to have a script to create the reverse lookup records from a forward lookup zone file. So here its goes…

#!/bin/sh
#@Author Daysen — daysenv@gmail.com

#———–
>rev

cp /var/lib/named/master/de.daysen.com.hosts fwd
sed -e ‘/^;/d’ fwd | sed -e ‘/^$/d’ > f1

while read line
do
RD_=`echo $line | awk ‘{print $3}’`
IN_=`echo $line | awk ‘{print $2}’`

if [ “$IN_” = “IN” ] && [ “$RD_” != “SOA” ]
then

if [ “$RD_” != “SRV” ]
then
if [ “$RD_” = “CNAME” ] || [ “$RD_” = “NS” ]
then
CN_=`echo $line | awk ‘{print $4}’`
if [ “$RD_” = “NS” ]
then
c=`nslookup $CN_ | grep -v “127.0.0.1” | grep “Address” | awk ‘{print $2}’ | awk -F . ‘{print $2″.”$1}’`
a=”$c.in-addr.arpa. IN NS     “
b=`echo $line | awk ‘{print $4}’`
else

c=`nslookup $CN_ | grep -v “127.0.0.1” | grep “Address” | awk ‘{print $2}’`
a=`echo $c | awk -F . ‘{print $4″.”$3″.”$2″.”$1″.in-addr.arpa.        IN        PTR     “}’`
b=`echo $line | awk ‘{print $1}’`
fi
else

c=`echo $line | awk ‘{print $4}’`
a=`echo $c | awk -F . ‘{print $4″.”$3″.”$2″.”$1″.in-addr.arpa.        IN        PTR     “}’`
b=`echo $line | awk ‘{print $1}’`
fi

echo $a”        “$b >> rev
sort -k3,4 rev > f2
mv f2 rev
fi
fi

done < f1

rm -f f1