Azure Custom Script Extension for Linux Emergencies

My colleague showed me a neat trick to run scripts on Azure Linux VMs as root. Use the Custom Script for Linux Extension. The Extension isn’t just for deployment – it can be run on an already-deployed Linux VM. By leveraging it to run shell scripts as root, you can make repairs to the system if you lock yourself out or need to add a user or ssh key for access. Store your script in a file and execute the extension via Portal, Azure CLI, or PowerShell.

The steps are covered in this MSDN blog article.

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