Assign multiple security groups on Amazon EC2 Run Instances (ec2-run-instances)

Comment

Recently, I needed to deploy new servers with multiple defined security groups on AWS EC2 using CLI.

Note: Security groups can only be defined on instance launch unless using VPC.

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econkle:~/ $ ec2-run-instances ami-12345678 -n 1 -k key-pair \
--instance-type m1.small --availability-zone us-east-1c \
-g default -g security.group-1 -g security.group-2 -g security.group-3

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