Ravi Sir's Cards › AWS
sed find and replace
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?
Edit text without opening files.
What is it?
s/old/new/g replaces all.
How to do it
-i edits in place; add .bak.
Example
Change a port safely.
sed -i.bak 's/8080/9090/g' app.conf