Step 1: Select the Workspaces and Labs perspective then Under Cloud formations find a formation with an Ubuntu icon such as Ubuntu Server 22.04
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From a Windows Machine: Download the PuTTY and the ppk file and run the command line (3) from your Downloads folder. If you want to transfer files from your local machine to the machine instance or vice versa, you can use WinSCP.
From a Linux/Mac Machine: Download the pem file and run the command line (2).
Step 6: Install emacs on the machine instance
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