1) Agile values and practices can be applied to operations by focusing on individuals and interactions, comprehensive automation through infrastructure as code, and responding quickly to changes rather than following a predefined plan.
2) Typical system administration involves manual and repetitive installation and configuration tasks, whereas automating infrastructure build through version control and continuous deployment allows infrastructure to be provisioned and configured in a consistent, automated way.
3) Monitoring everything from end-user experience to applications, databases, and operating systems enables detecting problems early. Automated alerts and root cause analysis facilitate fast problem resolution.