134 lines
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134 lines
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<h1>nslookup(1)</h1>
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<pre><code><strong>NAME</strong>
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nslookup - DNS hostname lookup
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<strong>SYNOPSIS</strong>
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nslookup <hostname>
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<strong>DESCRIPTION</strong>
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Resolves a hostname to an IPv4 address using the configured
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DNS server and prints the result.
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The kernel DNS resolver sends a UDP query to port 53 of the
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configured DNS server and waits up to 5 seconds for a reply.
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Results are cached in an 8-entry kernel cache with TTL support.
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<strong>OUTPUT</strong>
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Server: 10.0.68.1
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Name: example.com
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Address: 93.184.216.34
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Time: 3ms
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If the lookup fails:
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Could not resolve: badhost.invalid
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<strong>DNS CONFIGURATION</strong>
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The DNS server address is obtained automatically via DHCP.
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It can also be viewed and set with ifconfig. The default
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is 10.0.68.1 (QEMU user-mode networking).
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<strong>EXAMPLES</strong>
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nslookup google.com
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nslookup icanhazip.com
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<strong>SEE ALSO</strong>
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ping(1), fetch(1), dhcp(1), ifconfig(1), syscalls(2)</code></pre>
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