Shulou(Shulou.com)06/03 Report--

Introduction to CentOS 8

After the release of RHEL 8, the CentOS community also released the long-awaited CentOS 8 and released two modes:

CentOS stream: a rolling Linux distribution for developers who need frequent updates

CentOS: a stable operating system similar to RHEL 8 that system administrators can use to deploy or configure services and applications

What's New in CentOS 8

DNF has become the default package manager, while yum is still available

Use network managers (nmcli and nmtui) for network configuration and remove network scripts

Using Podman for container management

Two new package repositories have been introduced: BaseOS and AppStream

Use Cockpit as the default system management tool

Wayland is used as the display server by default

Iptables will be replaced by nftables

Using Linux kernel 4.18

Available with PHP 7.2,3.6,2.8,8.0,8.0 and Squid 4 for Python

Installation environment (minimum configuration)

2 GB RAM

64-bit x86 architecture, CPU of 2 GHz or above

More than 20 GB hard disk space

Installation method

1. Aliyun and Huawei Cloud can directly choose CentOS 8 as the operating system when purchasing servers.

two。 There are many installation methods, and the installation method using virtual machine 14 is mainly introduced here.

3. For first-time users of CentOS 8, it is recommended to use a graphical installation (with a desktop) first.

Installation step 1. Environment settings before system installation

2.centos 8 system installation

3. Enter the system and modify the network card

Vi / etc/sysconfig/network-scripts/ifcfg-ens33

Warm reminder:

1. The default network card ONBOOT=no of the newly installed system needs to be changed.

two。 Restart the network card, centos 8 cannot use service and systemctl

3. How to restart the Nic: nmcli c reload + Nic name

Method 1: nmcli c reload ifcfg-xxx

Method 2: nmcli c load / etc/sysconfig/network-scripts/ifcfg-xxx

Method 3: nmcli c load / etc/sysconfig/network-scripts/route-xxx

If the above methods do not work, restart the virtual machine system and take another look, there will be no problem

4. There are three ways to restart the Nic immediately (recommended)

Name of nmcli c up network card

Name of nmcli d reapply network card

Name of nmcli d connect network card

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