Practical Experience with Tsinghua Mirror Source Address and System Performance Optimization

# 1. Understanding Tsinghua Mirror Site Addresses

## 1.1 Introduction to Tsinghua Mirror Site Addresses

The Tsinghua University Open Source Software Mirror Site (hereinafter referred to as Tsinghua Mirror Site) is one of the well-known open source software mirror sites in China, providing rich open source software mirror download services, including operating systems, programming languages, development tools, and other software mirror resources.

## 1.2 Characteristics and Advantages of Tsinghua Mirror Site Addresses

Tsinghua Mirror Site has the following characteristics and advantages:
- It offers stable, high-speed download services, making it convenient for users to obtain the necessary software.
- It supports various operating system platforms, including Linux, Windows, macOS, etc.
- It has a rich software resource library, which is favored by developers in China.
- It provides a friendly online search function, which facilitates users in quickly locating the required software resources.

## 1.3 How to Use Tsinghua Mirror Site Addresses

Using the Tsinghua Mirror Site to download software is very simple. Users only need to access the Tsinghua Mirror Site website, search or browse for the required software, and then select the corresponding mirror link for download. If you need to configure the system to use the Tsinghua Mirror Site for software package management, specific operations will be detailed in subsequent sections.

# 2. Configure the System to Use Tsinghua Mirror Site Addresses

Configuring the Tsinghua Mirror Site in the system is an important step to improve software installation and update efficiency. The methods of configuration vary slightly for different operating systems. In this chapter, we will detail how to configure the Tsinghua Mirror Site in Linux, Windows, and macOS systems.

### 2.1 Configure the Tsinghua Mirror Site in Linux System

In the Linux system, we can configure the Tsinghua Mirror Site by modifying the `/etc/apt/sources.list` file. Here are the specific steps:

# Backup the original source address file
sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak

# Edit the source file, replace the original address with the Tsinghua Mirror Site address
sudo nano /etc/apt/sources.list

Add the following Tsinghua Mirror Site addresses to the file:

deb ***
***
***
***

Save and exit the editor, then execute the following command to update the sources:

sudo apt-get update

### 2.2 Configure the Tsinghua Mirror Site in Windows System

In the Windows system, the common method to use the Tsinghua Mirror Site is to configure it by modifying the system environment variables. Here are the specific steps:

1. Enter the environment variable settings in the system properties.
2. Create a new system variable named `MIRROR`, with the value being the Tsinghua Mirror Site address.
3. Add `%MIRROR%` to the system path variables, ensuring that the system software will preferentially use the Tsinghua Mirror Site when downloading updates.

### 2.3 Configure the Tsinghua Mirror Site in macOS System

In the macOS system, we can configure the Tsinghua Mirror Site through the Homebrew package manager tool. Here are the specific steps:

# Replace the Homebrew default source address
cd "$(brew --repo)"
git remote set-url origin ***

** "$(brew --repo)/Library/Taps/homebrew/homebrew-core"
git remote set-url origin ***

***
***

By following the above steps, configuring the Tsinghua Mirror Site in different operating systems can accelerate software installation and update speed, improving system efficiency. Next, we will introduce the basic knowledge of system performance optimization. Please stay tuned for the content of subsequent sections.

# 3. Basic Knowledge of System Performance Optimization

In this chapter, we will delve into the basic knowledge of system performance optimization, including understanding system performance indicators, analysis and solutions to common system performance issues, and how to assess the effects of system performance optimization.

#### 3.1 Understanding System Performance Indicators

In system performance optimization, we usually focus on the following major performance indicators:

- **CPU utilization**: refers to the extent to which the CPU in the system is used, usually expressed as a percentage. It can be used to assess the performance bottleneck of the CPU.
- **Memory utilization**: refers to the extent to which memory in the system is used, also expressed as a percentage. High memory utilization may lead to decre