Training first day Content brief

Rookie Learning Memories

Linux Day 1

Linux tenet:

1. All Documents

2. Small, single-use programs

3. Connect the program and complete complex tasks together

4. Avoid confusing user interfaces

5. Configuration data stored in text

Small Knowledge Points:

Rack-Mount Servers:

Width 19 inches, in U, 1U 2U 3U 4U 5U 7U

Typically, the cabinet is a 42U cabinet (height approx. 2 m)

Server Hardware--CPU

frequency = FSB x octave

The higher the frequency the faster the CPU

Cache: High-speed switched memory; CPU cache is divided into tier two level three cache

L1 L2 L3 L1 The bigger the more expensive

The server is divided by the number of CPUs

> 4-Way and more than 4-way servers (Enterprise Servers)

> 2-Way Server (departmental server)

> 1-Way Server (entry-level service)

1Byte = 8bit

1KB = 1024Byte (bytes) = 8*1024bit 2^10 = 1023 =1024 = 1K =1kib

1MB = 1024KB

1GB = 1024MB 2 of 10 square = 1024

1TB = 1024GB

1PB = 1024TB

HDD: (Short board for server performance)

Interface Type: Currently the main interface is SATA and SAS interface

So the hard disk can be divided into two types of hard disk SATA support hot-swappable

Storage Fundamentals-Storage networks

The device and media used for storing data information are the external storage of the computer system, the data can be stored safely, and the long-term resident

Storage network:

D A S---Direct-attached storage

N A S---network-attached storage

S A N---storage area network

Development interface;

ABI: An interface between the application and the underlying.

API: (development) interface between source code and library.

Use of virtual machines (VMware workstation)

CPU: Default

Memory: 1G above 2G recommended

HDD: One hard drive, 200G

network card: Bridging

Disc: Mount the corresponding version of the ISO image file

Training first day Content brief