KernelCare Blog

KernelCare Blog

by / Wednesday, 09 March 2016
How to switch from Ksplice to KernelCare in a single step

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 the Oracle Linux Premier Support. KernelCare is distribution-agnostic and supports Oracle Linux kernels, as well as CentOS,...

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by / Wednesday, 24 February 2016
Ubuntu LTS kernels patches to latest version with KernelCare

 

Ubuntu LTS kernels were updated to latest version. The update includes a number of security bug fixes.

Systems with AUTO_UPDATE=True (DEFAULT) in /etc/sysconfig/kcare/kcare. conf will automatically update, and no action is needed for them.
 
You can manually update the server by running:
#...

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by / Wednesday, 17 February 2016
CentOS/RHEL 7 kernels are patched to 3.10.0-327.10.1

This update has no security fixes, as CVE-2015-7872 was fixed earlier.

Systems with AUTO_UPDATE=True (DEFAULT) in /etc/sysconfig/kcare/kcare.conf will automatically update, and no action is needed for them.

You can manually update the server by running:

# /usr/bin/kcarectl --update

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by / Friday, 05 February 2016
Fix for quota inside the container vzkernel-2.6.32-042stab113.11

Some people were hit by a bug in recent vzkernel-2.6.32-042stab113.11 bug which made quota inside container for simfs not usable.

We have released the patch to address the underlying problem. Yet, due to the nature of the bug, and time when devices are created (on boot) - it requires user to run...

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by / Tuesday, 02 February 2016
Have you heard of cP1Con? Next stop: LA!

If you are a cPanel customer or partner, you probably have heard of cP1Con. It is cPanel’s first-ever global roadshow that CloudLinux is proud to be a part of.

These free one-day events, hosted in various locations throughout the world, feature product demos, training sessions, and many of...

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by / Friday, 23 October 2015
Friday Humor, Episode 2.

Servers always reboot at the wrong time!

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by / Friday, 09 October 2015
Friday Humor, Episode 1

Every time you reboot a server, a kitten dies!

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by / Friday, 13 March 2015
KernelCare protection against Rowhammer privilege escallation

The rmemory hardware issue "Rowhammer" was recently discovered to allows privileged escalation. The issue can be mitigated (at least in its current form) by preventing user from reading /proc/$(pid)/pagemap, /proc/kpageflags, /proc/kpagecount files. Yet, this protection is not available from...

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by / Thursday, 05 March 2015
KernelCare: How does it work?

Rebooting is a pain

Rebooting server is a pain. It is often scheduled for the darkest of the night. It requires minutes of downtime, and it can take up to 15 minutes for the server performance to stabilize, and catches to warm up. This is not something you want to do often.Yet, any time there...

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by / Monday, 05 January 2015
KernelCare support for Ubuntu 14.04 LTS (Trusty Tahr) added

We have added KernelCare support for Ubuntu 14.04 LTS (Trusty Tahr)

As of now we support:
RHEL/CentOS 5, 6 & 7
CloudLinux 5, 6, 5hybrid
Debian 6, 7
Ubuntu 14.04

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