cgroups

View documentation for cgclassify

$ tldr cgclassify

$ tldr cgcreate

$ tldr cgexec

cgroups (control groups) is a Linux kernel feature for limiting, measuring, and controlling resource usage by processes. It is not a single command but a collection of tools and kernel interfaces.
Cgroups can limit CPU, memory, I/O, and network resources. They are fundamental to container technologies like Docker and systemd resource management.

cgclassify

Move running processes to a cgroup

Create new cgroups

Run a command in a cgroup

Get cgroup parameters

Set cgroup parameters

Remove cgroups

Linux has two versions of cgroups (v1 and v2) with different interfaces. Modern systems often use cgroups v2 unified hierarchy. The libcgroup tools work with v1; systemd manages v2 natively.

cgclassify(1), cgcreate(1), cgexec(1), systemd-cgtop(1)