Ravi Sir's Cards › AWS
Why visudo, not vi?
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
What it is
It checks syntax before saving.
Why it matters
A typo can lock out sudo.
How / example
Check a drop-in.
sudo visudo -cf /etc/sudoers.d/50-web