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87 lines
1.6 KiB
Markdown
87 lines
1.6 KiB
Markdown
# Dig
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1. [TL;DR](#tldr)
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1. [Further readings](#further-readings)
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1. [Sources](#sources)
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## TL;DR
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<details>
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<summary>Setup</summary>
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```sh
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# Installation.
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apt-get install 'dnsutils'
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yum install 'bind-utils'
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```
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</details>
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<details>
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<summary>Usage</summary>
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```sh
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# Perform a DNS lookup.
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dig 'google.com'
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dig 'google.com' 'A'
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# Perform a reverse lookup.
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dig -x '172.217.14.238'
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# Only show the IP from the result.
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dig 'google.com' '+short'
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# Do not echo the executed command.
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# This is a global flag, notice the position.
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dig +nocmd 'google.com'
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# Clear display flags.
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dig 'google.com' +noall
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# Do not display the answer section of replies.
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dig 'google.com' +noanswer
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# Print records in a verbose multi-line format with human-readable comments.
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dig 'google.com' +multiline
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# See resolution trace.
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dig 'google.com' '+trace'
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# Ask a specific DNS server.
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dig '@8.8.8.8' 'google.com'
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# Return all results.
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dig 'google.com' 'ANY'
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# Only return the first answer.
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dig +short 'google.com'
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```
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</details>
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<details>
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<summary>Real world use cases</summary>
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```sh
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dig +trace '@1.1.1.1' 'google.com'
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dig 'A' +short '@172.31.0.2' 'fs-0123456789abcdef0.efs.eu-west-1.amazonaws.com'
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```
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</details>
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## Further readings
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### Sources
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- [How to Use Linux dig Command (DNS Lookup)]
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- [Using dig +trace to Understand DNS Resolution from Start to Finish]
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<!--
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Reference
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═╬═Time══
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-->
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<!-- Others -->
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[how to use linux dig command (dns lookup)]: https://phoenixnap.com/kb/linux-dig-command-examples
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[using dig +trace to understand dns resolution from start to finish]: https://ns1.com/blog/using-dig-trace
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