Update README

Author: binarymist

README.md

@@ -81,7 +81,12 @@ Or with a handful of commands you can install the latest, details [here](https:/
 
 # Install aws-sam-cli
 
-The [install details](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-sam-cli-install.html) for Linux can be found [here](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-sam-cli-install-linux.html).  
+The [install details](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-sam-cli-install.html) for Linux can be found [here](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-sam-cli-install-linux.html).
+
+There is two install options, the older one which uses Homebrew and the newer one (which we recommend) which uses a shell script.
+
+## [Homebrew](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-cli-install-linux-alt.html)
+
 You will need to install brew first. Once you have done that `which brew` will show you were it is installed.  
 Contrary to the install instructions, it was installed to: `/home/linuxbrew/.linuxbrew/Homebrew/bin/brew`  
 For us we use zsh, so adding homebrew to our path was just adding the following line to our ~/.zshrc file:  
@@ -99,6 +104,10 @@ brew tap aws/tap
 brew install aws-sam-cli
 ```
 
+## [Shell](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-sam-cli-install-linux.html)
+
+Just follow the directions.
+
 # Configuring aws cli
 
 In order to validate SAM templates, [you'll need](https://github.com/awslabs/aws-sam-cli/issues/394) an AWS user with CLI access and policy `AWSQuickSightListIAM` added to the group of the CLI user, then, usually the easiest way to do this is to run [`aws configure`](https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-getting-started.html) which will create two files ([`~/.aws/credentials`](https://docs.aws.amazon.com/sdk-for-javascript/v2/developer-guide/loading-node-credentials-shared.html) & `~/.aws/config`) if they don't already exist. The `aws_access_key_id` & `aws_secret_access_key` will be created in the `credentials` file if they don't exist, and the `output` & [`region`](https://docs.aws.amazon.com/emr/latest/ManagementGuide/emr-plan-region.html) will be created in the `config` file if they don't exist. If you don't set the region you'll end up with [errors](https://github.com/awslabs/aws-sam-cli/issues/442)