Summary: This is what I call my Infra Toolbox. After working in IT Infra for over 25 years in all functions you can think of I think I know what you need to do to keep everything running smoothly. This is based on my own experience, both as a system administrator as well as a teamlead.
Date: Around 2015
Refactor: 2 January 2025: Added diagram, added info on agile and devops.

The major topics are:

• Datacenter services
• Platform services
• Infrastructure services
• Applications
• Presentation services
• Security services
• Management services

Note that the overview does not really include scrum and devops practices. The overview if from a work environment before agile and devops principles were implemented on a broad scale. If you are working in a company that uses agile and devops, be sure to add things like, transparency, inspection and adaption, infra as code and automate everything into your environment as well.