Final answer:
As an IT network administrator, the best action after a Canonical security patch release is to evaluate the update's impact in a test environment, and then proceed to update the production Ubuntu servers while following company procedures and documenting changes.
Step-by-step explanation:
As an IT network administrator for XYZ Limited, the best action to take following a security vulnerability patch release from Canonical is to first assess the update for stability and compatibility in a controlled environment. This helps to prevent any potential interruptions to critical applications running on your Ubuntu Linux server. After evaluation and ensuring that the applications' functionality will not be affected, proceed to update your production servers with the patch. This process typically involves backing up the existing system and configuration, applying the update, and then conducting post-update testing to ensure continued system integrity and application functionality.
By being proactive and diligent with updates, you maintain system security as well as ensure the reliability and availability of company applications. When applying the update, it is critical to adhere to the established policies and procedures related to system updates and change management within your organization. Always document the update process and any changes made, to maintain a clear change history and facilitate any necessary rollbacks or troubleshooting.