Ravi Sir's Cards › AWS
grep vs grep -E
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
Regex type
grep
Basic regex.
grep -E
Extended regex.
Key points
+ ? and OR need backslashes.
+ ? OR and {n} work directly.
Example
grep 'cat\(s\)\?' f
Use when
Simple words.
Patterns with OR.