Howtoforge published a tutorial about setting up automatic rebootless kernel updates in Linux server.

How to set up automatic rebootless kernel updates in Linux server

Patching the kernel on a Linux server seems simple. It can be done using common tools such as dpkg, apt-get, or kexec. These methods, however, become complicated if an organization runs hundreds or thousands of servers. Many servers mean multiple distributions to patch, each of which requires personal attention from a sysadmin or engineer.

How to set up automatic rebootless kernel updates in Linux server