Kernel update with kernelcare does not need a reboot?

Im thinking in getting Kernelcare on my VPS, is it true that i will not need a reboot on a kernel update?

Asked on July 26, 2018 in Sysadmin.
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The kernel is the central module of an operating system (OS).

It is the part of the operating system that loads first, and it remains in main memory.

Because it stays in memory, it is important for the kernel to be as small as possible while still providing all the essential services required by other parts of the operating system and applications.

So, the kernel is one of the very most important parts of the operating system and is responsible for memory management, process, task management and disk management. The kernel actually connects the system hardware to the application software.

Now that you understand how important the kernel is, a responsible system admin has to always make sure that he has the latest kernel updates and kernel security patches to avoid issues.

Keeping the kernels updated manually can take hours, will cause server downtime & stressing system admins and clients alike.

A server has to be rebooted after applying any kernel updates or patches and such reboots usually have to be done during off-peak hours.

This additional stress is never welcome but avoiding server reboots can create server issues and causing security concerns.

Sometimes after a reboot, the server may face issues and not readily come back up and fix such issues can take hours.

Sometimes a system admin has to roll back the kernel updates that he has applied in order to get the server online as quickly as possible.

This is where KernelCare comes in.

It provides a service that will patch security vulnerabilities inside the running kernel – without any downtime or service interruption.

With Kernel Care installed on your server, security updates are applied automatically (every 4 hours) on a running server (live server), without downtime, removing the need to reboot the server.

Operating Systems Supported –

  • CentOS/RHEL 5, 6 and 7
  • Cloud Linux 5 and 6
  • OpenVZ
  • Virtuozzo
  • PCS
  • Debian 6 & 7
  • Ubuntu 14.04.

Let’s take a look at benefits & features of kernel care

1 ) Automated kernel patching, without reboots –

With KernelCare installed on a server, all security kernel updates are applied automatically as soon as the patch is available without the need for a reboot which actually avoids downtime and keeps your server running with the latest versions of kernels so you are sure that you have an updated version running on your server.

2) Latest security & stability upgrades

KernelCare runs a check for the availability of new patches every 4 hours. It downloads and applies all patches automatically.

There is no need to check the updates and apply them on the server manually which saves you time while KernelCare handles this critical aspect of server administration.

3) Takes minutes to install

Installing kernel care is quite simple and it doesn’t require rebooting the server.

All it takes is a simple command via command line.

4) Prompt patches roll out

The KernelCare team is constantly monitoring security mailing lists.

Once they notice that there is a security vulnerability that affects one of the supported kernels – they prepare a patch for that vulnerability.

5) No performance impact

KernelCare loads patches using a special kernel module with no impact on system performance since those take only nanoseconds.

6) Ability to roll back changes

You can always roll back all applied changes by running a special command.

With all the above features and benefits, having KernelCare installed on your system is always highly recommended.

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Answered on July 26, 2018.
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