Upgrade a single node RHEL, CentOS, or Oracle Linux installation of Splunk UBA

Before upgrading Splunk UBA on a single server, be sure you have verified the Upgrade Splunk UBA prerequisites.

Single server upgrade steps

Ensure that Splunk UBA is running before you upgrade, then perform the following tasks to upgrade Splunk UBA on a single server.

Splunk UBA release 5.0.3 on Linux operating systems is available in a patch installation package with the version number 5.0.3.1.

Obtain the Splunk UBA Software Update and download the file to the /home/caspida directory. Select version 5.0.3 from the drop-down list. The downloadable archive file is named splunk-uba-software-upgrade-package_5031.tgz.
Extract the archive with the following command:
```
tar xfz /home/caspida/ splunk-uba-software-upgrade-package_5031.tgz -C /home/caspida
```
The following files are extracted:
- splunk-uba-software-update-000027-503.tgz
- splunk-uba-software-update-000027-503.tgz.md5sum
- uba-ext-pkgs-5.0.3.tgz
- uba-ext-pkgs-5.0.3.tgz.md5sum

Extract the software update package in the /home/caspida directory:

tar xfz /home/caspida/splunk-uba-software-update-000027-503.tgz -C /home/caspida

Apply the patch with the following command:
```
/home/caspida/patch_uba_503/bin/utils/patch_uba.sh -p /home/caspida/patch_uba_503 -e /home/caspida/uba-ext-pkgs-5.0.3.tgz
```
The command installs the new Splunk UBA software including the updated OpenJDK and Docker image, restarts Splunk UBA, and then restarts the data sources.

Perform the following tasks to apply the latest Linux operating system security patches:

Log in to the Splunk UBA server as the caspida user.
Run the following command to stop Splunk UBA and all services:
```
/opt/caspida/bin/Caspida stop-all
```
Run the following command to install the security plugin:
```
sudo yum -y install yum-plugin-security
```
Run the following commands to check for any available security updates:
```
sudo yum updateinfo list security all
sudo yum updateinfo list sec
```
Run the following command to update all packages with the available security updates:
```
sudo yum update --security -y
sudo yum --security update-minimal
```
Reboot the system:
```
sudo reboot
```
Run the following command to start Splunk UBA and all services:
```
/opt/caspida/bin/Caspida start-all
```