Имеется конфиг файл xml-config.xml в формате XML:

<?xml version="1.0" encoding="UTF-8"?>
<zonelist>
        <domain name="domain01.com" admin="dns@domainadmin.com" ttl="1D" refresh="8H" retry="2H" expire="1W" negttl="60M">
                <record type="NS" value="ns1.domain01.com." />
                <record type="NS" value="ns2.domain01.com." />
                <record type="A" value="123.255.255.123" ttl="600" />
                <record type="A" domain="subdomain01" ttl="4H" value="123.255.255.255" />
                <record type="CNAME" domain="www" value="domain01.com." />
                <record type="MX" priority="10" value="mail1.server.com." />
                <record type="MX" priority="20" value="mail2.server.com." />
                <record type="MX" priority="30" value="mail3.server.com." />
                <record type="SPF" value="123.255.255.123,_spf.google.com" />
                <record type="TXT" value="This is a text record" />
        </domain>
        <domain name="domain02.net" admin="dns@domainadmin.com" ttl="1D" refresh="8H" retry="2H" expire="1W" negttl="60M">
                <record type="NS" value="ns1.domain02.net." />
                <record type="NS" value="ns2.domain02.net." />
                <record type="A" value="123.255.255.125" ttl="600" />
                <record type="A" domain="subdomain05" ttl="4H" value="123.255.255.255" />
                <record type="CNAME" domain="www" value="domain02.net." />
                <record type="MX" priority="10" value="mail1.server.com." />
                <record type="MX" priority="20" value="mail2.server.com." />
                <record type="MX" priority="30" value="mail3.server.com." />
                <record type="SPF" value="123.255.255.125,_spf.google.com" />
                <record type="TXT" value="This is a text record" />
        </domain>
</zonelist>

Нужно:
1) считать type="A" для домена domain02.net
2) ножно изменить IP для поддомена subdomain01.domain01.com

По пункту 1) остановился на:

echo 'cat zonelist/domain/record' | \
xmllint --shell  xml-config.xml | grep 'type="A"'

По пункту 2) кроме как sed не приходить в голову.

P.S. где бы еще про xmllint почитать примеры?
а то регэкспы вида:

echo 'cat zonelist/@*[name()="domain01.com" or name()="File"]' | \
    xmllint --shell  xml-config.xml

мне не понятны