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**To create a security group for EC2-Classic**
This example creates a security group named ``MySecurityGroup``.
Command::
aws ec2 create-security-group --group-name MySecurityGroup --description "My security group"
Output::
{
"GroupId": "sg-903004f8"
}
**To create a security group for EC2-VPC**
This example creates a security group named ``MySecurityGroup`` for the specified VPC.
Command::
aws ec2 create-security-group --group-name MySecurityGroup --description "My security group" --vpc-id vpc-1a2b3c4d
Output::
{
"GroupId": "sg-903004f8"
}
For more information, see `Using Security Groups`_ in the *AWS Command Line Interface User Guide*.
.. _`Using Security Groups`: http://docs.aws.amazon.com/cli/latest/userguide/cli-ec2-sg.html