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[SQL Server] July 2025 GDR - merge main to live
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support/azure/azure-kubernetes/connectivity/troubleshoot-cluster-connection-issues-api-server.md

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ms.reviewer: rissing chiragpa, beleite, v-leedennis, v-weizhu
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ms.service: azure-kubernetes-service
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#Customer intent: As an Azure Kubernetes user, I want to take basic troubleshooting measures so that I can avoid cluster connectivity issues with the API server.
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ms.custom: sap:Connectivity
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ms.custom: sap:Connectivity,innovation-engine
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---
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# Basic troubleshooting of cluster connection issues with the API server
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This article discusses connection issues to an Azure Kubernetes Service (AKS) cluster when you can't reach the cluster's API server through the Kubernetes cluster command-line tool ([kubectl](https://kubernetes.io/docs/reference/kubectl/overview/)) or any other tool, such as using REST API through a programming language.
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1. Enter the following [az aks show](/cli/azure/aks#az-aks-show) command in Azure CLI. This command gets the fully qualified domain name (FQDN) of your AKS cluster.
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First, export your resource names to environment variables and add a random suffix to the resource group and cluster names for unique testing.
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```azurecli
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az aks show --resource-group <cluster-resource-group> --name <cluster-name> --query fqdn
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export RANDOM_SUFFIX=$(head -c 3 /dev/urandom | xxd -p)
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export RESOURCE_GROUP="my-aks-rg$RANDOM_SUFFIX"
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export AKS_CLUSTER="myakscluster$RANDOM_SUFFIX"
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az aks show --resource-group $RESOURCE_GROUP --name $AKS_CLUSTER --query fqdn
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```
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Results:
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<!-- expected_similarity=0.3 -->
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```output
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"xxxxxx-xxxxxxxx.hcp.eastus2.azmk8s.io"
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```
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1. With the FQDN, check whether the API server is reachable from the client machine by using the name server lookup ([nslookup](/windows-server/administration/windows-commands/nslookup)), client URL ([curl](https://curl.se/docs/manpage.html)), and [telnet](/windows-server/administration/windows-commands/telnet) commands:
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2. With the FQDN, check whether the API server is reachable from the client machine by using the name server lookup ([nslookup](/windows-server/administration/windows-commands/nslookup)), client URL ([curl](https://curl.se/docs/manpage.html)), and [telnet](/windows-server/administration/windows-commands/telnet) commands:
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Replace `<cluster-fqdn>` with the actual FQDN returned from the previous step. For demonstration, we use a variable.
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```bash
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export CLUSTER_FQDN=$(az aks show --resource-group $RESOURCE_GROUP --name $AKS_CLUSTER --query fqdn -o tsv)
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# Check if the DNS Resolution is working:
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$ nslookup <cluster-fqdn>
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nslookup $CLUSTER_FQDN
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# Then check if the API Server is reachable:
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$ curl -Iv https://<cluster-fqdn>
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$ telnet <cluster-fqdn> 443
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curl -k -Iv https://$CLUSTER_FQDN
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# Test raw TCP connectivity (output will vary depending on environment)
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timeout 5 telnet $CLUSTER_FQDN 443 || echo "Connection test completed"
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```
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1. If the AKS cluster is private, make sure you run the command from a virtual machine (VM) that can access the AKS cluster's Azure Virtual Network. See [Options for connecting to the private cluster](/azure/aks/private-clusters#options-for-connecting-to-the-private-cluster).
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3. If the AKS cluster is private, make sure you run the command from a virtual machine (VM) that can access the AKS cluster's Azure Virtual Network. See [Options for connecting to the private cluster](/azure/aks/private-clusters#options-for-connecting-to-the-private-cluster).
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1. If necessary, follow the steps in the troubleshooting article [Client IP address can't access the API server](client-ip-address-cannot-access-api-server.md), so the API server adds your client IP address to the IP ranges it authorizes.
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4. If necessary, follow the steps in the troubleshooting article [Client IP address can't access the API server](client-ip-address-cannot-access-api-server.md), so the API server adds your client IP address to the IP ranges it authorizes.
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1. Make sure the version of kubectl on your client machine isn't two or more minor versions behind the AKS cluster's version of that tool. To install the latest version of kubectl, run the [az aks install-cli](/cli/azure/aks#az-aks-install-cli) command in Azure CLI. You can then run [kubectl version](https://kubernetes.io/docs/reference/generated/kubectl/kubectl-commands#version) command to check the version number of the new installation.
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5. Make sure the version of kubectl on your client machine isn't two or more minor versions behind the AKS cluster's version of that tool. To install the latest version of kubectl, run the [az aks install-cli](/cli/azure/aks#az-aks-install-cli) command in Azure CLI. You can then run [kubectl version](https://kubernetes.io/docs/reference/generated/kubectl/kubectl-commands#version) command to check the version number of the new installation.
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For example, on Linux you would run these commands:
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```bash
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```shell
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sudo az aks install-cli
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kubectl version --client
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```
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For other client operating systems, use these [kubectl installation instructions](https://kubernetes.io/docs/tasks/tools/).
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1. If necessary, follow the steps in the troubleshooting article [Config file isn't available when connecting](config-file-is-not-available-when-connecting.md), so your Kubernetes configuration file (*config*) is valid and can be found at connection time.
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6. If necessary, follow the steps in the troubleshooting article [Config file isn't available when connecting](config-file-is-not-available-when-connecting.md), so your Kubernetes configuration file (*config*) is valid and can be found at connection time.
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1. If necessary, follow the steps in the troubleshooting article [User can't get cluster resources](user-cannot-get-cluster-resources.md), so you can list the details of your cluster nodes.
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7. If necessary, follow the steps in the troubleshooting article [User can't get cluster resources](user-cannot-get-cluster-resources.md), so you can list the details of your cluster nodes.
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1. If you're using a firewall to control egress traffic from AKS worker nodes, make sure the firewall allows the [minimum required egress rules for AKS](/azure/aks/limit-egress-traffic).
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8. If you're using a firewall to control egress traffic from AKS worker nodes, make sure the firewall allows the [minimum required egress rules for AKS](/azure/aks/limit-egress-traffic).
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1. Make sure the [network security group that's associated with AKS nodes](/azure/aks/concepts-security#azure-network-security-groups) allows communication on TCP port 10250 within the AKS nodes.
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9. Make sure the [network security group that's associated with AKS nodes](/azure/aks/concepts-security#azure-network-security-groups) allows communication on TCP port 10250 within the AKS nodes.
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For other common troubleshooting steps, see [TCP time-outs when kubectl or other third-party tools connect to the API server](tcp-timeouts-kubetctl-third-party-tools-connect-api-server.md).
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[!INCLUDE [Azure Help Support](../../../includes/azure-help-support.md)]
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[!INCLUDE [Azure Help Support](../../../includes/azure-help-support.md)]

support/sql/releases/linux/release-history-2017.md

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author: rwestMSFT
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ms.author: randolphwest
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ms.reviewer: amitkh, vanto
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- SQL Server 2017
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| Release | Version | Release date |
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| --- | --- | --- |
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| [CU 31 GDR 7](#CU31-GDR7) | 14.0.3495.9 | 2025-07-08 |
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| [AzureConnectFeaturePack](#AzureConnectFeaturePack) | 14.0.3490.10 | 2025-03-06 |
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| [CU 31 GDR 6](#CU31-GDR6) | 14.0.3485.1 | 2024-11-12 |
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| [CU 31 GDR 5](#CU31-GDR5) | 14.0.3480.1 | 2024-10-08 |
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| [CU 1](#CU1) | 14.0.3006.16 | 2017-10-24 |
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| [GA](#GA) | 14.0.1000.169 | 2017-10-02 |
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<a id="CU31-GDR7"></a>
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## CU 31 GDR 7 (July 2025)
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This is the Cumulative Update 31-GDR7 (CU 31 GDR 7) release of [!INCLUDE [sql-server-2017](../../includes/versions/sql-server-2017.md)]. This is a security update that also includes the previously released CU (CU 31). The [!INCLUDE [sql-server-database-engine](../../includes/versions/sql-server-database-engine.md)] version for this release is 14.0.3495.9. For information about the fixes and improvements in this release, see [KB 5058714](https://support.microsoft.com/help/5058714).
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The latest GDR release includes the Azure Connect Pack for [!INCLUDE [sql-server-2017](../../includes/versions/sql-server-2017.md)].
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> [!IMPORTANT]
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> This is the final cumulative update for [!INCLUDE [sql-server-2017](../../includes/versions/sql-server-2017.md)].
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### Package details
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For manual or offline package installations, you can download the RPM and Debian packages with the information in the following table:
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| Distribution | Package version | Downloads |
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| --- | --- | --- |
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| **RHEL 8.x RPM packages** | 14.0.3495.9-1 | [Database Engine RPM package](https://packages.microsoft.com/rhel/8/mssql-server-2017/Packages/m/mssql-server-14.0.3495.9-1.x86_64.rpm)<br />[Full-Text Search RPM package](https://packages.microsoft.com/rhel/8/mssql-server-2017/Packages/m/mssql-server-fts-14.0.3495.9-1.x86_64.rpm)<br />[High Availability RPM package](https://packages.microsoft.com/rhel/8/mssql-server-2017/Packages/m/mssql-server-ha-14.0.3495.9-1.x86_64.rpm) |
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| **SLES 12 RPM packages** | 14.0.3495.9-1 | [Database Engine RPM package](https://packages.microsoft.com/sles/12/mssql-server-2017/Packages/m/mssql-server-14.0.3495.9-1.x86_64.rpm)<br />[Full-Text Search RPM package](https://packages.microsoft.com/sles/12/mssql-server-2017/Packages/m/mssql-server-fts-14.0.3495.9-1.x86_64.rpm)<br />[High Availability RPM package](https://packages.microsoft.com/sles/12/mssql-server-2017/Packages/m/mssql-server-ha-14.0.3495.9-1.x86_64.rpm) |
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| **Ubuntu 18.04 Debian packages** | 14.0.3495.9-1 | [Database Engine Debian package](https://packages.microsoft.com/ubuntu/18.04/mssql-server-2017/pool/main/m/mssql-server/mssql-server_14.0.3495.9-1_amd64.deb)<br />[Full-Text Search Debian package](https://packages.microsoft.com/ubuntu/18.04/mssql-server-2017/pool/main/m/mssql-server-fts/mssql-server-fts_14.0.3495.9-1_amd64.deb)<br />[High Availability Debian package](https://packages.microsoft.com/ubuntu/18.04/mssql-server-2017/pool/main/m/mssql-server-ha/mssql-server-ha_14.0.3495.9-1_amd64.deb) |
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Go back to the [release history](#release-history).
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## Azure Connect Pack (March 2025)
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This is the Azure Connect Pack for [!INCLUDE [sql-server-2017](../../includes/versions/sql-server-2017.md)]. The [!INCLUDE [sql-server-database-engine](../../includes/versions/sql-server-database-engine.md)] version for this release is 14.0.3490.10. For information about the fixes and improvements in this release, see the [Support article](../sqlserver-2017/azureconnect.md).
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> [!IMPORTANT]
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> This is the Azure Connect Pack, which includes CU 31 for [!INCLUDE [sql-server-2017](../../includes/versions/sql-server-2017.md)].
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> This is the Azure Connect Pack, which includes CU 31 for [!INCLUDE [sql-server-2017](../../includes/versions/sql-server-2017.md)]. Any future GDR updates include the Azure Connect Pack.
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### Package details
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support/sql/releases/linux/release-history-2019.md

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| Release | Version | Release date |
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| [CU 32 GDR](#CU32-GDR) | 15.0.4435.7 | 2025-07-08 |
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| [CU 32](#CU32) | 15.0.4430.1 | 2025-02-27 |
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| [CU 31](#CU31) | 15.0.4420.2 | 2025-02-13 |
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| [CU 30](#CU30) | 15.0.4415.2 | 2024-12-12 |
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| [GA](#GA) | 15.0.2000.5 | 2019-11-04 |
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| [GDR 1](#GDR1) | 15.0.2070.41 | 2019-11-04 |
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<a id="CU32-GDR"></a>
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## CU 32 GDR (July 2025)
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This is the Cumulative Update 32-GDR (CU 32 GDR) release of [!INCLUDE [sql-server-2019](../../includes/versions/sql-server-2019.md)]. This is a security update that also includes the previously released CU (CU 32). The [!INCLUDE [sql-server-database-engine](../../includes/versions/sql-server-database-engine.md)] version for this release is 15.0.4435.7. For information about the fixes and improvements in this release, see [KB 5058722](https://support.microsoft.com/help/5058722).
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> [!IMPORTANT]
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> This is the final cumulative update for [!INCLUDE [sql-server-2019](../../includes/versions/sql-server-2019.md)].
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### Package details
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For manual or offline package installations, you can download the RPM and Debian packages with the information in the following table:
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| Distribution | Package version | Downloads |
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| --- | --- | --- |
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| **RHEL 8.x RPM packages** | 15.0.4435.7-2 | [Database Engine RPM package](https://packages.microsoft.com/rhel/8/mssql-server-2019/Packages/m/mssql-server-15.0.4435.7-2.x86_64.rpm)<br />[Extensibility RPM package](https://packages.microsoft.com/rhel/8/mssql-server-2019/Packages/m/mssql-server-extensibility-15.0.4435.7-2.x86_64.rpm)<br />[Java Extensibility RPM package](https://packages.microsoft.com/rhel/8/mssql-server-2019/Packages/m/mssql-server-extensibility-java-15.0.4435.7-2.x86_64.rpm)<br />[Full-Text Search RPM package](https://packages.microsoft.com/rhel/8/mssql-server-2019/Packages/m/mssql-server-fts-15.0.4435.7-2.x86_64.rpm)<br />[High Availability RPM package](https://packages.microsoft.com/rhel/8/mssql-server-2019/Packages/m/mssql-server-ha-15.0.4435.7-2.x86_64.rpm)<br />[PolyBase RPM package](https://packages.microsoft.com/rhel/8/mssql-server-2019/Packages/m/mssql-server-polybase-15.0.4435.7-2.x86_64.rpm) |
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| **SLES 15 RPM packages**<br /><br />(Get RPM packages for [SLES 12](https://packages.microsoft.com/sles/12/mssql-server-2019/Packages/m/)) | 15.0.4435.7-2 | [Database Engine RPM package](https://packages.microsoft.com/sles/15/mssql-server-2019/Packages/m/mssql-server-15.0.4435.7-2.x86_64.rpm)<br />[Extensibility RPM package](https://packages.microsoft.com/sles/15/mssql-server-2019/Packages/m/mssql-server-extensibility-15.0.4435.7-2.x86_64.rpm)<br />[Java Extensibility RPM package](https://packages.microsoft.com/sles/15/mssql-server-2019/Packages/m/mssql-server-extensibility-java-15.0.4435.7-2.x86_64.rpm)<br />[Full-Text Search RPM package](https://packages.microsoft.com/sles/15/mssql-server-2019/Packages/m/mssql-server-fts-15.0.4435.7-2.x86_64.rpm)<br />[High Availability RPM package](https://packages.microsoft.com/sles/15/mssql-server-2019/Packages/m/mssql-server-ha-15.0.4435.7-2.x86_64.rpm)<br />[PolyBase RPM package](https://packages.microsoft.com/sles/15/mssql-server-2019/Packages/m/mssql-server-polybase-15.0.4435.7-2.x86_64.rpm) |
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| **Ubuntu 20.04 Debian packages**<br /><br />(Get Debian packages for [Ubuntu 18.04](https://packages.microsoft.com/ubuntu/18.04/mssql-server-2019/pool/main/m/mssql-server/)) | 15.0.4435.7-2 | [Database Engine Debian package](https://packages.microsoft.com/ubuntu/20.04/mssql-server-2019/pool/main/m/mssql-server/mssql-server_15.0.4435.7-2_amd64.deb)<br />[Extensibility Debian package](https://packages.microsoft.com/ubuntu/20.04/mssql-server-2019/pool/main/m/mssql-server-extensibility/mssql-server-extensibility_15.0.4435.7-2_amd64.deb)<br />[Java Extensibility Debian package](https://packages.microsoft.com/ubuntu/20.04/mssql-server-2019/pool/main/m/mssql-server-extensibility-java/mssql-server-extensibility-java_15.0.4435.7-2_amd64.deb)<br />[Full-Text Search Debian package](https://packages.microsoft.com/ubuntu/20.04/mssql-server-2019/pool/main/m/mssql-server-fts/mssql-server-fts_15.0.4435.7-2_amd64.deb)<br />[High Availability Debian package](https://packages.microsoft.com/ubuntu/20.04/mssql-server-2019/pool/main/m/mssql-server-ha/mssql-server-ha_15.0.4435.7-2_amd64.deb)<br />[PolyBase Debian package](https://packages.microsoft.com/ubuntu/20.04/mssql-server-2019/pool/main/m/mssql-server-polybase/mssql-server-polybase_15.0.4435.7-2_amd64.deb) |
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Go back to the [release history](#release-history).
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<a id="CU32"></a>
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## CU 32 (February 2025)

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