Ravi Sir's Cards › AWS
chattr locks
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?
Even root cannot change it.
What is it?
+i immutable, +a append only.
How to do it
lsattr shows the flags.
Example
Protect DNS config.
sudo chattr +i /etc/resolv.conf