aws ec2 create-route --route-table-id
aws ec2 create-route --route-table-id <rtb> --destination-cidr-block <cidr> (--gateway-id <igw> | --nat-gateway-id <nat>)
Risk: Careful
What it does
Adds a road sign to a route table.
When to use it
To make a row public (to an internet gateway). Or to let back rooms out (to a NAT gateway). Check which row first.
Example
$ aws ec2 create-route --route-table-id rtb-22574640 --destination-cidr-block 0.0.0.0/0 --gateway-id igw-c0a643a9Send every other address to the internet gateway.
$ aws ec2 describe-route-tablesRead every row's road signs.
Learn it in: Internet and NAT gateways · Official docs