Ravi Sir's Cards › AWS
Check a web service
What is a VPC: your own private network inside one AWS Region, example ThreeTierVpc 10.0.0.0/16.
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What this card says
Why do we need it?
DNS answer.
dig +short example.com
What is it?
HTTP status.
curl -sI https://example.com
How to do it
Timing.
curl -o /dev/null -sw '%{time_total}
' URL
Example
Clock in sync.
chronyc tracking