Ever heard of a pipe-freeze kit? A pipe-freeze kit forms a plug of ice inside a water pipe, allowing a plumber to make repairs without shutting off water.
Like water pipes, there are some things that you don’t want to shut down to fix.
Rebooting a system to install security updates and patches isn’t necessary, but it happens every day in the form of server reboot cycling. Conversely, live patching of an enterprise Linux system flash freezes central processing units (CPUs) to install patches automatically, taking nanoseconds to complete.