Ravi Sir's Cards › AWS
chattr +i vs chattr +a
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
Allows
chattr +i
Nothing: no write, delete, rename.
chattr +a
Only adding to the end.
Key points
Freeze configs.
Protect logs.
Example
chattr +i /etc/resolv.conf
Use when
DNS or critical config.
Audit trails.