Where to dig to understand such proposals?

Question

English learning tools

Here (about changing process priorities in Linux):

In Linux we can set guidelines for the CPU to follow when it is looking at all the tasks it has to do.

In general, the meaning of this sentence is clear, but the grammar of this sentence (the part after the CPU) is not clear. How is it built, what is the logic of connections between words/phrases?
I ask you to push on topics (you can use links) that will allow you to parse the grammar of this sentence to the bone.

Answer 1

Paste in Google translate, get
In Linux, we can set recommendations for the processor to keep an eye on when it looks at all the tasks it has to perform.
This shows the discrepancy with the planc translation : we should follow, not the processor followed.
The rule is: to with a verb means "in order to". Well, "has to" is an obligation.