How many kernels do 10 containers running on a Linux host require?

In Linux, containers utilize a single kernel to run multiple isolated environments. This is one of the core advantages of containerization; it allows for lightweight and efficient resource usage. When you run multiple containers on a Linux host, they share the same operating system kernel, which means they do not require separate kernels for each container.

Therefore, regardless of the number of containers running (in this case, 10), they all rely on a single kernel of the host operating system. This results in less overhead and improved performance compared to virtual machines, which typically require a separate kernel for each instance. Thus, only one kernel is required to support all ten containers running on the Linux host.