46 lines
1.4 KiB
Markdown
46 lines
1.4 KiB
Markdown
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# The `nslookup` command
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The `nslookup` command is a network administration command-line tool for querying the Domain Name System (DNS) to obtain domain name or IP address mapping or any other specific DNS record.
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## Syntax
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```
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nslookup [options] [host]
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```
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## Options
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Some popular option flags include:
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```
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-domain=[domain-name] Change the default DNS name.
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-debug Show debugging information.
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-port=[port-number] Specify the port for queries. The default port number is 53.
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-timeout=[seconds] Specify the time allowed for the server to respond.
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-type=a View information about the DNS A address records.
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-type=any View all available records.
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-type=hinfo View hardware-related information about the host.
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-type=mx View Mail Exchange server information.
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-type=ns View Name Server records.
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-type=ptr View Pointer records. Used in reverse DNS lookups.
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-type=soa View Start of Authority records.
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```
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## Few Examples:
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1. Query DNS Server
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```
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nslookup www.google.com
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```
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2. Specify a port to query
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```
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nslookup -port=53 www.google.com
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```
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3. Get the MX Record
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```
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nslookup -type=mx google.com
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```
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Here I showed you how to use the nslookup command in Linux. Although there are other DNS lookup tools, such as dig, nslookup could be a better choice as it is a powerful tool present in almost every system.
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For more details: [Nslookup on Wikipedia](https://en.wikipedia.org/wiki/Nslookup)
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