Why prove HTTP before HTTPS?	It narrows failures before certificate issuance and redirect rules add complexity.	topicladder software linux
What does the 'Point the root record' step prove?	The root domain usually needs an A record to the VPS IP. Check: dig +short example.com A returns the expected IP.	topicladder software linux
What does the 'Point www deliberately' step prove?	www can be a CNAME to the root domain or its own A record. Check: dig +short www.example.com returns a sensible answer.	topicladder software linux
What does the 'Serve HTTP first' step prove?	Certificate issuance is easier after port 80 answers correctly. Check: curl -I http://example.com returns the expected site.	topicladder software linux
What does the 'Add HTTPS last' step prove?	TLS should be configured after DNS and HTTP are already proven. Check: curl -I https://example.com returns 200 or redirect as intended.	topicladder software linux
When would you use `dig +short topicladder.com A`?	Use it to check the root a record. Expected signal: The VPS IPv4 address	topicladder software command
When would you use `dig +short www.topicladder.com`?	Use it to check the www answer. Expected signal: A CNAME or resolved IP	topicladder software command
When would you use `curl -I http://topicladder.com/`?	Use it to verify public http. Expected signal: A status line and server headers	topicladder software command