Ravi Sir's Cards › AWS
Regex cheat card
What is a VPC: your own private network inside one AWS Region, example ThreeTierVpc 10.0.0.0/16.
Read card text
What this card says
Why do we need it?
Match patterns, not just words.
What is it?
^ start, $ end, . any, * repeat.
How to do it
-E for + ? | {n} and groups.
Example
Extract IPs only.
grep -oE '[0-9]+(\.[0-9]+){3}' access.log