免費安裝註冊RHEL(Red Hat Enterprise Linux)

因為CentOS 8之後政策修改，只好研究官方的RHEL如何安裝註冊
免費的Red Hat Developer Subscription授權僅限用於開發用途(development environment)

註冊Red Hat網站帳號
https://www.redhat.com

下載最新版ISO檔安裝
https://developers.redhat.com/products/rhel/download

下載舊版ISO檔、Supplementary、virt-p2v、KVM Guest Image、原始碼等(以RHEL 7.5為例)
https://access.redhat.com/downloads/content/69/ver=/rhel---7/7.5/x86_64/product-software

參考文件
https://developers.redhat.com/products/rhel/hello-world

查看已註冊的產品
https://access.redhat.com/management/subscriptions/

2021/02/01更新
小型企業可以免費使用16套授權
https://www.redhat.com/en/blog/new-year-new-red-hat-enterprise-linux-programs-easier-ways-access-rhel

• No-cost RHEL for small production workloads

• No-cost RHEL for customer development teams

紅帽推出免費與低成本RHEL計畫
https://www.ithome.com.tw/news/142391

FAQ: Changes to the Red Hat Developer program’s no-cost subscriptions
https://developers.redhat.com/articles/faq-changes-red-hat-developer-programs-no-cost-subscriptions
新政策只能安裝16個VM中
Under the new no-cost Red Hat Developer Subscription available from March 2018 onward, the maximum number of VMs supported by RHEL is now 16.
舊的
Program members who have activated the legacy Red Hat Enterprise Linux Developer Subscription may continue run up to 99 VMs inside their activated copy of Red Hat Enterprise Linux (RHEL.) 

透過指令註冊：
subscription-manager register
https://access.redhat.com/solutions/253273

透過介面註冊：

輸入subscription.rhn.redhat.com