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DNS and BIND

Checking Configuration Files

The /usr/local/sbin directory contains two useful tools: named-checkconf and named-checkzone. These tools are to check whether your configuration files are valid.

Checking /etc/named.conf

Run the named-checkconf command to check whether your named.conf file is valid. If no results are returned, the configuration should be correct:

/usr/local/sbin/named-checkconf /etc/named.conf

Replace /etc/named.conf with the location of your named.conf file.

Checking Zone Database Files

The following is an example of checking the db.testdomain.com zone database file using the named-checkzone command:

/usr/local/sbin/named-checkzone testdomain.com /etc/bind/db.testdomain.com

The first argument is the zone name as it appears in named.conf, in this case testdomain.com. The last argument is the location of the zone database file for testdomain.com, in this case /etc/bind/db.testdomain.com. The output of the named-checkzone command should be similar to the following:

zone testdomain.com/IN: loaded serial 2007031008
OK

The serial number, 2007031008, will be different in each case.

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