Redhat DNS debug

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BIND Troubleshooting Commands

There are four commands used with BIND: named, rndc, dig and host

named

named is used to start, stop and reset the DNS server using the daemon in /usr/sbin. This is controlled by the script in /etc/init.d/.

Dig and Host

Dig and Host are successors to nslookup.

dig is used to check that a request is handled. Passing it an address dig will return its IP.

rndc

Running rndc on its own lists all of the options that can be used.

status - shows the status if the DNS server
flush - flushes the previous config and cache
reload - restarts the DNS with the new config
stop / start - stops and starts the DNS

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