Does Linux update require reboot?

With versions of Linux before 4.0, when the kernel is updated via a patch, the system needs to reboot. … This is why it’s important to install the patch as soon as possible. Unlike other operating systems, Linux is able to update many different parts of the system without a reboot, but the kernel is different.

How often should I reboot my Linux server?

We recommend that you reboot your Linux server every month to install kernel updates from Red Hat, firmware upgrades from the server’s hardware vendor, and perform low-level system integrity checks.