You are advised to read the Linux Security Module (LSM) framework document at kernel.org. Linux namespaces wrap a global system resource in an abstraction that makes it appear to the processes within the 8 kinds of namespaces (see namespaces(7), unshare(1), nsenter(1)). As of Debian 11 Bullseye (2021), Debian uses unified cgroup hierarchy (a.k.a. cgroups-v2). Usage examples of namespaces with cgroups or OS in a light-weight container in similar ways to chroot. It is more powerful since it uses namespaces to fully virtualize the the process tree, IPC, hostname, domain name and, optionally, networking

Módulos Vimos como os blocos impl nos permitem usar namespaces (espaços de nomes) de funções para um tipo. Da mesma forma, mod nos permite usar namespaces de tipos e funções: mod foo { pub fn do_something()