1. TA is marking from a checkbox to see if there is a need to proceed.
2. Manager talks to you for 15 minutes over the phone or an app.
3. Technical interview with team members.
4. Recruiting manager interview.
5. HR.

They describe a complex setup of clients and servers. Something is not working, and you need to show that you can use Linux commands to debug. You also need to know where various resources are, like logs and such. You need to know about processes, users, permissions, networks, and storage.