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

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# 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
# 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
# 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

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