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April 16, 2022 06:37
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Useful `dig` and `curl` commands
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# Query any record | |
dig A paulogdm.com | |
dig NS paulogdm.com | |
dig CNAME www.paulogdm.com | |
# Query any record using a specific DNS resolver | |
dig A paulogdm.com @1.1.1.1 | |
dig A paulogdm.com @8.8.8.8 | |
# Query record with a trace of the DNS resolution | |
dig NS paulogdm.com @1.1.1.1 +trace | |
# Get headers | |
curl https://paulogdm.com -I | |
# Get a specific header | |
curl https://paulogdm.com -I | grep etag | |
# Make a POST request | |
curl -d '{"key1":"value1"}' -H "Content-Type: application/json" -X POST http://paulogdm.com/api | |
# Check if SSL is working as expected from the Vercel server | |
# Useful for "Zero Downtime" migrations. | |
curl https://paulogdm.com --resolve paulogdm.com:443:76.76.21.21 -I |
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