CloseKernels
terminates all parallel kernels from the list Kernels[].
CloseKernels[k]
terminates the kernel k.
CloseKernels[{k1,k2,…}]
terminates the kernels k1, k2, ….
Details

- Kernels can be specified either using KernelObject, as returned by Kernels[], or using their integer IDs, as returned by $KernelID.
- Closed kernels are removed from the list of kernels available for parallel computing, as given by Kernels[].
Examples
open allclose allScope (2)
Applications (1)
Properties & Relations (1)
Distributed definitions and shared variables apply to running kernels and new ones:
Packages read with ParallelNeeds also apply to running and new kernels:
Close all running kernels and launch new ones:
The new kernels inherit previously distributed definitions and shared variables:
Text
Wolfram Research (2008), CloseKernels, Wolfram Language function, https://reference.wolfram.com/language/ref/CloseKernels.html.
CMS
Wolfram Language. 2008. "CloseKernels." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/CloseKernels.html.
APA
Wolfram Language. (2008). CloseKernels. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/CloseKernels.html