Installing a virtual machine on a CentOS system requires: Install virtualization software (such as KVM, VirtualBox or VMware ESXi) Create a virtual machine, allocate resources and install a virtual hard disk Install a guest operating system Configure virtual machine settings (such as shared files folders, snapshots, and security) to manage virtual machines (start, stop, clone, and update)
How to install a virtual machine on CentOS
Preface
A virtual machine is a virtual computing environment created on a physical host that allows you to run multiple operating systems on a single physical server. This article will guide you step by step on how to install a virtual machine on a CentOS system.
Step 1: Install virtualization software
First, you need to install virtualization software on your CentOS system. There are several popular virtualization software options available, including:
- KVM (Kernel-based Virtual Machine)
- VirtualBox
- VMware ESXi
Step 2: Create a virtual machine
After installing the virtualization software, you can start creating a virtual machine. The specific steps vary depending on the virtualization software selected, but the general steps are as follows:
- Allocate virtual machine resources (such as CPU, memory, storage)
- Create a virtual hard disk
- Install operating system
- Configure network connection
Step 3: Install guest operating system
After the virtual machine is created, you can Install the guest operating system. This can be any operating system such as Windows, Linux, or macOS.
Step 4: Configure virtual machine settings
After creating the virtual machine, you may need to configure some additional settings, such as:
- Sharing Folder
- Snapshots and Backups
- Security Settings
Step 5: Manage Virtual Machine
Install in the virtual machine Once done, you can manage it, including:
- Start and stop virtual machines
- Manage resources
- Clone virtual machines
- Maintenance & Updates
Other Tips
- When installing virtualization software, make sure your system meets the requirements.
- The performance of a virtual machine depends on the resources of the physical host.
- Back up virtual machines regularly to prevent data loss.
- Use the snapshot function to create a backup point of the virtual machine.
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CentOS is suitable for building powerful and reliable servers. Its advantages include: 1. Stability and reliability, support cycle up to 10 years; 2. Security, built-in SELinux and regular security patches; 3. Compatibility and ecosystem, highly compatible with RHEL, with a rich software warehouse; 4. Performance optimization, suitable for various hardware platforms and providing kernel tuning.

CentOS will continue to evolve in the future, and users should choose alternative distributions. 1) Evaluate the requirements, choose such as RockyLinux or AlmaLinux, and focus on stability and support. 2) Develop a migration plan, use tools such as CentOS2Rocky, and pay attention to testing and verification. 3) Plan early, maintain contact with the open source community, and ensure a smooth transition.

CentOS is widely selected as a server operating system because it is stable, secure and free. 1.CentOS is based on RHEL, providing enterprise-level stability and a life cycle of up to 10 years. 2. It has rich software packages and strong community support. 3. Simple installation, use yum management software package, and intuitive configuration. 4. Improve server management efficiency through command line tools, regular backups and log management. 5. Optimize server performance by adjusting kernel and network parameters.

CentOS will continue to develop through CentOSStream in the future. CentOSStream is no longer a direct clone of RHEL, but is part of RHEL development. Users can experience the new RHEL functions in advance and participate in development.

The transition from development to production in CentOS can be achieved through the following steps: 1. Ensure the consistent development and production environment, use the YUM package management system; 2. Use Git for version control; 3. Use Ansible and other tools to automatically deploy; 4. Use Docker for environmental isolation. Through these methods, CentOS provides powerful support from development to production, ensuring the stable operation of applications in different environments.

CentOSStream is a cutting-edge version of RHEL, providing an open platform for users to experience the new RHEL functions in advance. 1.CentOSStream is the upstream development and testing environment of RHEL, connecting RHEL and Fedora. 2. Through rolling releases, users can continuously receive updates, but they need to pay attention to stability. 3. The basic usage is similar to traditional CentOS and needs to be updated frequently; advanced usage can be used to develop new functions. 4. Frequently asked questions include package compatibility and configuration file changes, and requires debugging using dnf and diff. 5. Performance optimization suggestions include regular cleaning of the system, optimizing update policies and monitoring system performance.

The reason for the end of CentOS is RedHat's business strategy adjustment, community-business balance and market competition. Specifically manifested as: 1. RedHat accelerates the RHEL development cycle through CentOSStream and attracts more users to participate in the RHEL ecosystem. 2. RedHat needs to find a balance between supporting open source communities and promoting commercial products, and CentOSStream can better convert community contributions into RHEL improvements. 3. Faced with fierce competition in the Linux market, RedHat needs new strategies to maintain its leading position in the enterprise-level market.

RedHat shut down CentOS8.x and launches CentOSStream because it hopes to provide a platform closer to the RHEL development cycle through the latter. 1. CentOSStream, as the upstream development platform of RHEL, adopts a rolling release mode. 2. This transformation aims to enable the community to get exposure to new RHEL features earlier and provide feedback to accelerate the RHEL development cycle. 3. Users need to adapt to changing systems and reevaluate system requirements and migration strategies.


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