Install CentOS8.1 virtual machine
Article directory
This article mainly refers to the video " P116_ Han Shunping Linux_cntos8 Installation and Introduction " at station B.
Purpose of this article: Use VMware17 to create a brand new CentOS8.1 virtual machine.
1. CentOS8.1 installation
1.1 Download CentOS8.1 image
To install a virtual machine, you must first download an image CD. The most commonly used image source in China is Alibaba Cloud, but unfortunately, Alibaba Cloud does not provide the image source of CentOS8.1 at present, but according to the readme provided by it, I finally found it:
- CentOS official website download address: CentOS8.1 official website image , and then click to download CentOS-8.1.1911-x86_64-dvd1.iso (as shown in Figure 20-1).
- My own Baidu network disk: CentOS-8.1.1911-x86_64-dvd1.iso
Note: The CentOS development team will stop maintenance support for CentOS8 on January 1, 2022, and CentOS7 will also stop maintenance on June 30, 2024.
1.2 Check BIOS virtualization support
First check whether "Virtualization" is enabled, if it is not enabled, Ubantu cannot be installed later. The basic idea is to check whether it is "enabled" in "Performance Manager->Performance->CPU->Virtualization". You can refer to the CSDN blog post "How to determine whether the CPU virtualization function is enabled in the BIOS setting? ".
- If enabled, go to the next step.
- If it is not enabled, you can refer to the Baidu article " Enable BIOS Virtualization Settings | Enable CPU Virtualization Support ". Note that different brands of motherboards have different keys to enter the BIOS. ,
f2,f12etc.DELcan be tried or Baidu.
1.3 Create a new virtual machine
It is still the old rule, VMware menu bar "File" -> "New Virtual Machine", and then you can create a virtual machine as shown in the figure below:
1.4 Installing the system
After the virtual machine is created, it is time to install the system. First, complete some initial work:
- Add disk and boot.
- Quickly press the up and down arrow keys when starting up and select the first Enter. Do not select Test this media, otherwise the detection time will be very long.
- Select the language as Chinese.
The next step is to officially start the installation and configuration of CentOS.
Configure the "installation destination" below, including the configuration of the three partitions of /boot partition, /swap partition, and /root directory.
Then there is the "kernel crash dump mechanism". Note that it can be closed during learning, and the working environment must be open to ensure that key information can be recorded for crash review.
Then set the network and host name, of course, you can set it again after installation.
After the above settings are completed, click "Start Installation", and then it will jump to the system installation interface. At this time, the user needs to set the "root password" and "create user". After the setting is completed, it will be a long wait. After the installation is complete, click "Restart".
After restarting, you need to agree to the "License". After clicking "End Configuration", the system will automatically restart several times, and finally jump to the login interface.
Next, use the root user to log in and complete some option configurations after login.
1.5 Test Internet access and terminal
2. The difference between CentOS8.0 and CentOS7.0 (understand)
Finally, let me briefly talk about the difference between the two specific versions of CentOS, CentOS8.0 and CentOS7.0.
| Function | CentOS7.0 | CentOS8.0 |
|---|---|---|
| kernel version | 3.10.0-x | 4.18.0-x |
| File system | XFS | XFS |
| time synchronization | Support for NTP and Chronyd | Only supports Chronyd |
| File size | 500TB | 8EB |
| file system size | 500TB | 1PB |
| package management tool | YUM(YUM v3) | DNF(YUM v4) |
| maximum memory | 12TB | 24TB |
| firewall | The bottom layer of firewall uses iptables | nftables replaces iptables |
| support structure | 64-bit ARM is not supported | Support 64-bit ARM |
| network management | None installed by default | Cockpit is installed by default |
| CPU log | CPU-related logs are located in the /var/log/cups directory | CPU logging is recorded in the journald process |
| release time | 2014-07-07 | 2019-09-24 |
| full update | 2020-08-06 | 2024-05-01 |
| Support IPv6 | Ready Logo Phase 2 | support |
| Git | 1.7 | 2.18 |
| GCC | 4.8.5 | 8.2.1 |
| Python | 2.7.5 | 3.6.6 |
| Glibc | 2.17 | 2.28 |
| Boost | 1.53 | 1.66 |
| LLVM/Clang | 5.0 | 6.0 |