Advanced Topic 48 of 51 Operating Systems
Namespaces and Cgroups
Linux features isolating and limiting process resources.
How it works
Namespaces give a process its own view of PIDs, network, mounts and users; cgroups limit and account CPU, memory and I/O for groups of processes. Together they make containers.
Where it is used
Docker, systemd.
Common pitfall
Namespaces isolate visibility, not security by themselves.
Where it fits in the course
Namespaces and Cgroups is topic 48 of 51 in Operating Systems, rated Advanced. It follows Hypervisors. The next topic is Microkernels vs Monolithic Kernels.
Practice and explore
- Open the interactive lesson, with a mini quiz.
- Take the Operating Systems quiz.
How to study this topic
- Read the explanation above and restate the definition in your own words.
- Open the interactive lesson and answer its mini quiz.
- Read the common pitfall, then write a short example that avoids it.
- Check your understanding in the Operating Systems quiz, and revisit the topic if you miss a question.
Frequently asked questions
What is Namespaces and Cgroups?
Linux features isolating and limiting process resources. It belongs to Operating Systems and is an advanced-level topic.
Where do people use Namespaces and Cgroups?
Docker, systemd.
What is the most common mistake with Namespaces and Cgroups?
Namespaces isolate visibility, not security by themselves.
What should I learn before this topic?
Start with Hypervisors, the topic just before it in Operating Systems.
How can I practice it?
Answer the mini quiz in the interactive lesson, then take the Operating Systems quiz.
Is Namespaces and Cgroups hard to learn?
It is an Advanced topic. Expect to read the explanation more than once and to connect it with earlier topics. Working through a small example by hand helps most.
How long does it take to learn Namespaces and Cgroups?
Most learners can read the explanation and finish the interactive lesson in under an hour. Fluency comes from applying the idea, so plan a few short practice sessions with the quiz.
Which topics are related to Namespaces and Cgroups?
Hypervisors, Microkernels vs Monolithic Kernels, Containers are closely connected. The full list is in the related topics section of this page.
What should I study after Namespaces and Cgroups?
Continue with Microkernels vs Monolithic Kernels, the next topic in Operating Systems.
Related topics
- Hypervisors (Operating Systems)
- Microkernels vs Monolithic Kernels (Operating Systems)
- Containers (Operating Systems)
- Linux Kernel Internals (Operating Systems)