ubuntu20.04安装教程伪分布

### Ubuntu 20.04 Pseudo-Distributed Installation Guide #### Preparation of Environment and Resources For the pseudo-distributed environment setup, it is necessary to have a working installation of Ubuntu 20.04 either as a live server or desktop version which can be installed using ISO files like `Ubuntu20.04-live-server.iso` or `ubuntu-20.04-desktop-amd64.iso`. The latter can be obtained from official mirrors such as Aliyun or Tsinghua University for reliable downloads[^2]. #### System Configuration Adjustments Before proceeding with any distributed system installations (such as Hadoop), ensure that the package management sources are optimized by replacing default repositories with faster domestic ones available in China including but not limited to Alibaba Cloud, NetEase (163), Tsinghua University, and University of Science and Technology of China. This involves backing up the original `/etc/apt/sources.list` file before making changes[^4]. #### Installing Necessary Software Packages To enhance user experience on an Ubuntu GNOME-based desktop, additional extensions might need installing through tools like `chrome-gnome-shell`, which requires executing commands similar to: ```bash sudo apt install chrome-gnome-shell ``` This step may become relevant when configuring graphical interfaces within virtual machines used during development phases[^3]. #### Setting Up Pseudo-Distributed Mode Pseudo-distributed mode refers specifically to running all nodes locally on one machine simulating multiple instances across different hosts without actual network communication between separate physical servers. However, specific instructions regarding setting up this kind of configuration depend heavily upon what software stack you plan to deploy—for example, Apache Spark, Hadoop, etc.—and thus detailed guidance would typically come directly from documentation associated with those technologies rather than general Linux distributions themselves.