AWS CLI multiple profiles

When using the AWS CLI, you may be working with multiple AWS accounts.  Therefore, you will want to have multiple profiles.  The profile configuration file is contained in the ~/.aws/config on Linux, OS X, or Unix.  In this file, you will list all of your profiles. At the command prompt or in your .profile file you can have do the following to chose the profile you would like:

export AWS_DEFAULT_PROFILE=<profilename>

ELB and Security Groups

The ELB Security Groups for EC2 classic can not be changed and the ELB security group name is the same across all ELBs launched an account. This means there is no way to control security group for different apps as same securiy group name across the account.  VPC changes this as each ELB has its own security group name.