oam/knowledge base/dig.md

Dig

Table of contents

1. TL;DR
2. Sources

TL;DR

# Installation.
apt-get install 'dnsutils'
yum install 'bind-utils'

# 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'

Sources

• How to Use Linux dig Command (DNS Lookup)
• Using dig +trace to Understand DNS Resolution from Start to Finish