RHEL8 subscription-managerでサブスク登録を行う方法

環境
Red Hat Enterprise Linux release 8.6 (Ootpa)

操作方法
1.SUBSCRIPTION-MANAGER登録

# subscription-manager register --auto-attach
Registering to: subscription.rhsm.redhat.com:443/subscription
Username: [ユーザー情報入力]
Password: [パスワード入力]
The system has been registered with ID: xxxxxxx-xx-xxxxx-xxx-xxxxxxxxx
略

2.コマンドで適用の確認方法
# subscription-manager list

+-------------------------------------------+
Installed Product Status
+-------------------------------------------+
Product Name: Red Hat Enterprise Linux for x86_64
略