Which two are true about using Ksplice?

Option A: Ksplice can be used without a network connection

Explanation:

Ksplice provides anOffline Clientspecifically designed for systems that do not have a direct connection to the internet. This client allows administrators to download Ksplice updates on a system with internet access and then transfer them to the offline system for installation.

This means Ksplice can be effectively used in environments with strict security policies where network connectivity is restricted or not available.

Oracle Linux Reference:

Oracle® Linux 8: Ksplice User's Guide- Section on "Using the Ksplice Offline Client":

"The Ksplice Offline client enables you to apply Ksplice updates to systems that do not have direct access to the Internet or to the Oracle Uptrack server."

Option B: It can patch the kernel without shutting down the system.

Explanation:

The primary purpose of Ksplice is to allow administrators to apply critical security patches to the running kernelwithout requiring a rebootor shutting down the system. This ensures high availability and minimizes downtime, which is crucial for production environments.

Ksplice works by performingjust-in-time (JIT) compilationof kernel patches and applying them directly to the running kernel in memory.

Oracle Linux Reference:

Oracle® Linux 8: Ksplice User's Guide- Introduction:

"Ksplice enables you to keep your systems up to date and secure by applying important kernel security updates without rebooting."

Why Other Options Are Not Correct:

Option C:Yum cannot upgrade a kernel patched by Ksplice

Explanation:

This statement is false. While Ksplice patches the running kernel in memory, yum can still upgrade the kernel packages on disk. After a yum kernel update, a reboot would be necessary to run the new kernel version, but yum operations are not hindered by Ksplice patches.

Oracle Linux Reference:

Oracle® Linux 8: Ksplice User's Guide- Compatibility with Package Managers:

"Ksplice works seamlessly with package management tools like yum and dnf. You can continue to use these tools to manage your kernel packages."

Option D:Ksplice has two clients; each can run in three different modes.

Explanation:

While Ksplice does have two clients (the online and offline clients), the statement about each running in three different modes is inaccurate or misleading. The clients do not operate in "three different modes" per se.

Oracle Linux Reference:

No official documentation supports the claim of "three different modes" for each client.

Option E:The Ksplice client is freely available to all customers.

Explanation:

Ksplice is a feature available to customers with an active Oracle Linux Premier Support subscription. It is not freely available to all users.

Oracle Linux Reference:

Oracle® Linux 8: Ksplice User's Guide- Access Requirements:

"To use Ksplice, your system must be covered by an Oracle Linux Premier Support subscription."

Conclusion:

Options A and B are correct because Ksplice can be used without a network connection via the offline client, and it allows patching the kernel without shutting down the system, ensuring minimal downtime.