As you may know, Microsoft has added access to Azure Shell (either PowerShell or Bash) directly from the portal; giving you the possibility to run shell commands directly from the web browser (see http://blog.hametbenoit.info/Lists/Posts/Post.aspx?ID=952)
Now, you can have access to the same without logging on to the Azure portal – just go to https://shell.azure.com/
If you have access to multiple Azure directory, you can then choose which one you want to connect to.
If this is the first time you are accessing the Azure Shell, you will be requested to create a storage account used to save the temporary files generated.
You can use the Advanced Settings option to define the resource group, location, storage account… you want to use or create
If you already has a storage account configured, you will be requested which language (Bash or PowerShell) you want to use