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oam/knowledge base/dig.md
Michele Cereda aee16b47b1 chore(dig): improve readability
2024-12-08 17:55:40 +01:00

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Dig

  1. TL;DR
  2. Further readings
    1. Sources

TL;DR

Setup 
# Installation.
apt-get install 'dnsutils'
yum install 'bind-utils'
Usage 
# Perform a DNS lookup.
dig 'google.com'
dig 'google.com' 'A'

# Perform a reverse lookup.
dig -x '172.217.14.238'

# Only show the IP from the result.
dig 'google.com' '+short'

# Do not echo the executed command.
# This is a global flag, notice the position.
dig +nocmd 'google.com'

# Clear display flags.
dig 'google.com' +noall

# Do not display the answer section of replies.
dig 'google.com' +noanswer

# Print records in a verbose multi-line format with human-readable comments.
dig 'google.com' +multiline

# See resolution trace.
dig 'google.com' '+trace'

# Ask a specific DNS server.
dig '@8.8.8.8' 'google.com'

# Return all results.
dig 'google.com' 'ANY'
Real world use cases 
dig +trace '@1.1.1.1' 'google.com'

Further readings

Sources