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This article discusses common issues in the Red Hat Update Infrastructure (RHUI) that are caused by expired or missing Transport Layer Security (TLS) or Secure Sockets Layer (SSL) certificates.
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## Prerequisites
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| Image type | Support model | Applicable version | RHUI package prefix | Using `releasever`? |
##### <aid="eus"></a> EUS RHUI package installation
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sudo rhel9-eus.config
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```
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###### [RHEL 10.x - EUS](#tab/rhel10-eus)
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1. Create a config file by using this command:
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```bash
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sudo tee rhel10-eus.config > /dev/null <<< $'[rhui-microsoft-azure-rhel10-eus]\nname=Microsoft Azure RPMs for Red Hat Enterprise Linux 10 (rhel10-eus)\nbaseurl=https://rhui4-1.microsoft.com/pulp/repos/unprotected/microsoft-azure-rhel10-eus\nenabled=1\ngpgcheck=1\ngpgkey=https://packages.microsoft.com/keys/microsoft-2025.asc\nsslverify=1'
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```
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2. Install the `rhui-azure-rhel10-eus` package by running.
4. Verify that the corresponding repositories are available and show no errors. To do this, run the `dnf repolist` command:
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```bash
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sudo dnf repolist all
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```
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5. Remove the temp file created on step 1.
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```bash
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sudo rhel10-eus.config
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```
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> [!NOTE]
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> If you're using a proxy in*/etc/yum.conf* or */etc/dnf.conf*, the `yum --config rhelX-XX-XX.config`command won't work because it doesn't include your proxy settings. In this case, move the temp file `rhelX-XX-XX.config` directly in`/etc/yum.repos.d/` as `.repo`
The following steps apply if the OS version is *earlier than the latest version that's available* that's supported by SAP for`RHEL 10.0`, and if the VM was created by using the `RHEL-SAP-APPS` offer image.
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1. Create a config file by using this command:
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```bash
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sudo tee rhel10-sapapps.config > /dev/null <<<$'[rhui-microsoft-azure-rhel10-sapapps]\nname=Microsoft Azure RPMs for Red Hat Enterprise Linux 10 (rhel10-sapapps)\nbaseurl=https://rhui4-1.microsoft.com/pulp/repos/unprotected/microsoft-azure-rhel10-sapapps\nenabled=1\ngpgcheck=1\ngpgkey=https://packages.microsoft.com/keys/microsoft-2025.asc\nsslverify=1'
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```
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2. Install the `rhui-azure-rhel10-sapapps` package by running the `dnf install` command:
The following steps apply if the OS version is *earlier than the latest version available* that's supported by SAP for`RHEL 10.0`, and if the VM was created by using the `RHEL-SAP-HA` offer image.
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1. Create a config file by using this command:
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```bash
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sudo tee rhel10-sap-ha.config > /dev/null <<<$'[rhui-microsoft-azure-rhel10-sap-ha]\nname=Microsoft Azure RPMs for Red Hat Enterprise Linux 10 (rhel10-sap-ha)\nbaseurl=https://rhui4-1.microsoft.com/pulp/repos/unprotected/microsoft-azure-rhel10-sap-ha\nenabled=1\ngpgcheck=1\ngpgkey=https://packages.microsoft.com/keys/microsoft-2025.asc\nsslverify=1'
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```
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2. Install the `rhui-azure-rhel10-sap-ha` package by running the `dnf install` command:
sudo tee rhel10-ha.config > /dev/null <<< $'[rhui-microsoft-azure-rhel10-ha]\nname=Microsoft Azure RPMs for Red Hat Enterprise Linux 10 (rhel10-ha)\nbaseurl=https://rhui4-1.microsoft.com/pulp/repos/unprotected/microsoft-azure-rhel10-ha\nenabled=1\ngpgcheck=1\ngpgkey=https://packages.microsoft.com/keys/microsoft-2025.asc\nsslverify=1'
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```
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2. Install the `rhui-azure-rhel10-ha` package by running the [dnf](https://dnf.readthedocs.io/en/latest/command_ref.html) installation command:
3. Lock the `releasever` level. Currently, the version must be 10.0.
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```bash
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sudo sh -c 'echo 10.0 > /etc/dnf/vars/releasever'
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```
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4. Verify that the corresponding repositories are available and show no errors. To do this, run the `dnf repolist` command:
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```bash
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sudo dnf repolist
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```
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5. Remove the temp file created on step 1.
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```bash
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sudo rm rhel10-ha.config
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```
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---
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> [!NOTE]
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> If you're using a proxy in*/etc/yum.conf* or */etc/dnf.conf*, the `yum --config rhelX-XX-XX.config`command won't work because it doesn't include your proxy settings. In this case, move the temp file `rhelX-XX-XX.config` directly in`/etc/yum.repos.d/` as `.repo`
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For more information about cryptographic policy, see [Strong crypto defaults in RHEL 8 and deprecation of weak crypto algorithms](https://access.redhat.com/articles/3642912).
Copy file name to clipboardExpand all lines: support/azure/virtual-machines/linux/yum-dnf-common-issues.md
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**Applies to:**:heavy_check_mark: Linux VMs
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## Summary
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This article discusses and resolves common issues that you might experience when you use `yum` and `dnf` package management tools to install or update applications on Microsoft Azure virtual machines (VMs).
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> [!CAUTION]
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2. Determine the current value for the release version by running the following `cat` command.
| RHEL 8, and 10|`sudo cat /etc/dnf/vars/releasever`|
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3. Modify and use the correct value for the release version:
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- If your system is using EUS repositories, make sure that the appropriate version lock is applied. In the following example, the version lock is added for RHEL 9.2 because `RHUI EUS` repositories are used:
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```bash
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sudo sh -c 'echo 9.2 > /etc/dnf/vars/releasever'
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sudo sh -c 'echo 9.6 > /etc/dnf/vars/releasever'
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```
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> [!NOTE]
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> Support forRHEL7 EUS ended on August 30, 2021. We recommend that you no longer use EUS repositoriesinRHEL7.
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> Support forRHEL 7 EUS ended on August 30, 2021. We recommend that you no longer use EUS repositoriesinRHEL 7.
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> RHEL 8._x_ versions forEUS are available. These versions include RHEL 8.8, 8.6, 8.4, 8.2, and 8.1.
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>Support forRHEL 8EUS ended on May 31, 2025. RHEL 8.10 is the last planned minor release of RHEL 8 and is still supported, but isn't an EUS release. We recommend that you no longer use EUS repositoriesin RHEL 8 and instead switch to the non-EUS repos.
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> RHEL 9._x_ versions for EUS are available. Currently, these versions include RHEL 9.2 and 9.0.
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> RHEL 9._x_ versions for EUS are available. Currently, these versions include RHEL 9.6 and 9.4.
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> RHEL 10._x_ versions for EUS are available. Currently, these versions include only RHEL 10.0.
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> For more information about version availability, see [Red Hat Enterprise Linux Life Cycle](https://access.redhat.com/support/policy/updates/errata).
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- If your system is using non-EUS repositories, make sure that you remove the version lock for the */etc/yum/vars/releasever* or */etc/dnf/vars/releasever* file by running the following command.
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