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[[Category:OPS335]]
= How to test your secondary DNS ?=
<pre>
test_items="scs.senecac.on.ca www.senecac.on.ca matrix.senecac.on.ca zenit.senecac.on.ca"
pri_dns_ip=142.204.33.53
sec_dns_ip=142.204.33.54
for test_item in $test_items
do
PRI_ANS=$(nslookup -query=A $test_item $pri_dns_ip | grep -v $pri_dns_ip | grep Address | awk '{print $2}')
#cho $PRI_ANS
SEC_ANS=$(nslookup -query=A $test_item $sec_dns_ip | grep -v $sec_dns_ip | grep Address | awk '{print $2}')
echo "Testing item: $test_item"
echo "Test Result from Primary DNS server: $pri_dns_ip -> $PRI_ANS"
echo "Test Result from Secondary DNS server: $sec_dns_ip -> $SEC_ANS"
[ "$SEC_ANS" = "$PRI_ANS" ] && echo match
done
</pre>
= How to create a tar ball file for a list of files from a text file?=
== Text file: pri-dns-file-list ==
<pre>
/etc/named.conf
/var/named/mydomain.db
/var/named/myip-rev.db
</pre>
== Text file: sec-dns-file-list ==
<pre>
/etc/named.conf
</pre>
== Text file: mas-nis-file-list ==
<pre>
/etc/sysconfig/network
/var/yp/Makefile
/var/yp/nisdomain/*
</pre>
== Text file: sla-nis-file-list ==
<pre>
/etc/sysconfig/network
/var/yp/Makefile
</pre>
== Backup Script ==
Name: backup.sh
Contents:
<pre>
if [ $# -lt 2 ]
then
echo "Usage: backup.sh file-list file-type
exit 1
fi
filelist=$1
type=$2
tarball_file=$(date +%Y%M%D)-${type}.tar
tar cvf ${tarball_file} -T ${filelist}
</pre>
To create a tar ball file on the Primary DNS server, you can run the following command:
<pre>
backup.sh pri-dns-file-list master
</pre>