Linux Fundamentals (Computer Fundamentals)

1. Computer Architecture: operator controller memory input device output device

Description: Storage is memory: address the storage unit. That is, every storage unit has a single address.

The controller tells the operator which storage unit addend in memory.

Post:bios

The computer can be self-lifting.

Program: Instruction + data

2.poll: (pull mechanism) The CPU keeps looking at who happened to the electrical signal

Interrupt: (Interrupt, the hardware notification mechanism) after the keyboard: the keyboard will notify CPU,CPU to see what the keyboard has done.

The CPU knows which device the signal is sent through the control chip. There are different devices on one line.

3. In order to make full use of CPU, multitasking, (think first thing for 10 seconds, think of the second thing for 10 seconds, then go ahead and think about the first thing.) Then the first thing 10 seconds memory is stored in memory. Then you need to divide, the CPU is cut into a slice. The memory is divided into multiple segments. This is all done by the operating system.

4.32-bit operating system: up to physical memory 2^

5. Procedure: Put on the operating system, as long as not delete it has been there. Execute the entrance, process: There is a life cycle, a certain time after the disappearance.

6. Library: A bunch of programs, they can not execute independently, only provide the calling interface, can be executed by the program call.

7. Operating system: With the operating system, any process to deal with the hardware, all have to go through the operating system. The operating system passes the lowest-level invocation: System call. After encapsulation, the library is formed.

8.shell: Human-computer interface.

Linux Fundamentals (Computer Fundamentals)