Documentation

What server does KernelCare connect to? To work properly, KernelCare must have access to port 80 of patches.kernelcare.com. However, if your server does not have Internet access, please use KernelCare ePortal. If you still have questions, feel free to contact us by opening a support ticket or by using our live chat feature. How to disable automatic updates You can disable KernelCare automatic updates by editing the following file: /etc/sysconfig/kcare/kcare.conf And setting it like this: AUTO_UPDATE = False If you still have questions about KernelCare automatic updates, feel free to contact us by opening a support ticket or by using our live chat... How to Uninstall KernelCare You can uninstall KernelCare by using the following command: # yum remove kernelcare If you still have questions or need more assistance, make sure to contact us by opening a support ticket or use our live chat feature to speak with a member of our support team. How to Force the Update of KernelCare In order to force the update of KernelCare you just have to use the command kcarectl --update as root An example of what it should look like: # kcarectl --update Kernel is safe If you still have questions about KernelCare updates, please contact us by opening a support ticket or by using our... How to Implement Delayed Updates The deferred feed ensures that your servers will receive patches 24 hours after publication. To implement the delayed feed, add PREFIX = 24h to /etc/sysconfig/kcare/kcare.conf If you still have questions about delayed updates with KernelCare, feel free to contact us by opening a support ticket or with... How to install KernelCare KernelCare supports the following operating systems: 64bit versions of RHEL/CentOS 6.x & 7.x, CloudLinux 6.x & 7.x, Virtuozzo/PCS/OpenVZ 2.6.32, Debian 6.x & 7.x and Ubuntu LTS 14.04(v3.13 & v4.4) & 16.04 kernels.See the details of the compatibilities of the nuclei here To install KernelCare,... How to migrate from Ksplice to KernelCare Ksplice is a technology that updates kernels with important security patches without the need to reboot. After its acquisition by Oracle, it is now offered as part of Oracle Linux Premier support. KernelCare was created by CloudLinux OS and is therefore independent of the distribution. KernelCare can... How to Check Your Version of KernelCare You can check the version of KernelCare using the following command: kcarectl --info.   Example: # kcarectl --info kpatch-state: patch is applied kpatch-for: Linux version 3.10.0-714.10.2.lve1.5.9.el7.x86_64 (mockbuild@build.cloudlinux.com) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-16) (GCC)... How to Check if your Kernel is Supported by KernelCare It is very important to know whether or not a particular kernel is supported by KernelCare. KernelCare supports a large number of distributions and kernel versions, such as CentOS/RHEL/CL 5.6 and 7, Debian, Ubuntu, Virtuozzo, and Proxmox VE. To simplify the process, a simple script was created that you can run on... How to see what patches have been applied To see which patches have been applied to your kernel, you can use the following command: kcarectl --patch-info You will see something like this: # kcarectl --patch-info OS: cl7 kernel: kernel-3.10.0-714.10.2.lve1.5.9.el7 time: 2018-05-05 10:51:41 kpatch-name:... Should I continue to update my operating system as before? Yes. KernelCare will provide important updates for your kernel, but you must continue to update your user applications. If you still have questions or concerns, feel free to contact us by opening a support ticket or by using our live chat feature. Official KernelCare Documentation KernelCare is a product of the CloudLinux OS, offering the possibility to automatically update your kernels without having to reboot your entire server. Its focus on security and constant upkeep of most Linux servers make both CloudLinux and KernelCare an important tool for any online business. If you have... Do I have to restart my server after installing KernelCare? One of the features that separates KernelCare from other services is how focused they are at providing the best service for their clients. Thanks to CloudLinux and the developers at KernelCare, there is no need to restart your server after installing KernelCare. If you still have questions, make sure to visit... Error: was already used for trialing on... If you see this message appearing on your screen: The IP 127.0.0.1 was already used for trialing on 2018-05-01 It means your free trial has ended for that server and you will need to get a license to use KernelCare. Luckily, Nuagerie is partnered with CloudLinux so feel free to visit our KernelCare... Does KernelCare work with third-party drivers? The CloudLinux team is devoted to making their clients lives as easy as possible, therefore KernelCare is able to work with third-party drivers. However, you will have to update the drivers manually as KernelCare does not update them. For more information about the powerful kernel manager, visit our KernelCare... Does KernelCare work on 32-bit servers? Unfortunately, KernelCare does not have 32-bit kernels at the moment. It is therefore not possible to make KernelCare function natively on 32-bit servers. If you still have questions about your system, please contact us by opening a support ticket or with our live chat feature. Can KernelCare work on servers that do not have Internet access? Yes. KernelCare can run on servers behind the firewall using KernelCare.ePortal. To learn more about how KernelCare.ePortal works, watch this video. If you still have questions or concerns, open a support ticket or use our live chat feature to talk with a member of our support team. I'm switching from Ksplice to KernelCare, should I restart? There is no need to restart - just uninstall Ksplice with: # yum uninstall ksplice If you still have questions or concerns, feel free to contact us by opening a support ticket or by using our live chat feature. Where can I get documentation or support? You can communicate with our team at any time - our technical advisors are there to help you. If you have questions or concerns, feel free to contact us by opening a support ticket or by using our live chat feature whenever you need it. You can also contact KernelCare official support by emailing... Can I use a single KernelCare key to register multiple servers? Yes. The KernelCare key can be used to deploy and register multiple servers at one time. KernelCare is often deployed on a large number of servers so adding these servers one by one would be a problem. In this case, the KernelCare key can be used to deploy and register multiple servers at one time.... Can I see which kernel is running on my server? Yes, it is possible. Simply enter the following command into your terminal: kcarectl --uname It's basically the same thing as uname -r. If you still have questions about your kernels, contact us by opening a support ticket or by using our live chat feature. What is KernelCare? KernelCare is a service that provides important updates for your running kernel, eliminating the need to restart your server. KernelCare was developed by CloudLinux and therefore works intrinsically with any CloudLinux-run server, however, KernelCare is able to work with 3rd party drivers. The best part about it:... When does it check for updates? Keeping your servers up-to-date is KernelCare's biggest priority, therefore it automatically checks for updates every 4 hours. If you want to learn more, make sure to visit our KernelCare page or feel free to contact us by opening a support ticket or by using our live chat feature. What happens if I install KernelCare but my kernel is not supported? If your kernel is not supported, KernelCare will detect it and do nothing. There is no danger (but also no benefit) of running KernelCare on unsupported cores. KernelCare will provide an "unsupported kernel" message when it knows nothing about a particular kernel. See the list of supported kernels or learn... What is the OpenVZ problem? If you have an OpenVZ, you will exclude=kernel* in your yum.conf Use the following command to update: # yum update kernelcare --disableexcludes=main. If you still have questions or concerns, feel free to contact us by opening a support ticket or by using our live chat feature. What kernels does KernelCare support? KernelCare supports: For a full list of supported kernels, visit patches.kernelcare.com or learn how to check if your OS is supported by KernelCare. Custom kernel patching available. Distributions CentOS 6 CentOS 6 Plus CentOS 7 CentOS 7 Plus RHEL 6 RHEL 7... Who develops KernelCare patches? Hotfix creation requires a solid kernel development context as well as a powerful set of tools for preparing and testing patches. The KernelCare team consists of a group of highly skilled kernel developers working full time on monitoring security and kernel mailing lists and patch preparation. If you want to... Are all patches from new kernels applied? KernelCare is constantly making sure your servers are secure, therefore it focuses on only the security patches. However, they do apply patches for critical bugs whenever the situation calls for it. If you want to know more about KernelCare's features, visit our KernelCare page or contact us by opening a... Do you use the same technology as Oracle, Red Hat or Suse? KernelCare technology has been fully developed internally and uses different methods to generate patches and apply them. This method of patching is significantly more efficient than what we have seen or read to date from other vendors. If you want to see more KernelCare features, visit our KernelCare page or...