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本文为早期笔记，可能存在版本过时、命令失效、链接失效、最佳实践变化等问题。请以官方最新文档为准。

注册 RHEL 订阅

原英文标题：Register RHEL

Un-register the system :

sudo subscription-manager remove --all
sudo subscription-manager unregister
sudo subscription-manager clean

Re-register the system :

sudo subscription-manager register
sudo subscription-manager refresh

Search for the Pool ID :

sudo subscription-manager list --available

Attach to subscription :

subscription-manager role --set="Red Hat Enterprise Linux Workstation"
subscription-manager service-level --set="Self-Support"
subscription-manager usage --set="Development/Test"
subscription-manager attach --pool <pool_id>

Set release ver

subscription-manager release --set 8

Clean YUM and cache :

sudo dnf clean all
sudo rm -r /var/cache/dnf

Update the resources :

sudo dnf upgrade

Install epel

yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm