# User Mode Linux

7 Hacker News commenters recommended User Mode Linux and 1 criticized it, November 2025 to November 2026. It was recommended in 3 of 13 months.

**Verdict:** Runs the Linux kernel as an ordinary userspace program; people praise it as cool technology that works well.

## Why people recommend it

- Seen as cool technology (3 comments): "UML was a really really cool piece of technology." ([source](https://news.ycombinator.com/item?id=47574801)) "Yes, User mode linux pretty cool project." ([source](https://news.ycombinator.com/item?id=47571582)) "User mode linux is so cool." ([source](https://news.ycombinator.com/item?id=47571488))
- Runs Linux as a normal program (2 comments): "I would personally favor UML, since at that point Linux is just a normal userspace program that you can attach to" ([source](https://news.ycombinator.com/item?id=46347620)) "Play a bit with user mode linux the kernel becomes literally a linux program" ([source](https://news.ycombinator.com/item?id=46233257))

## Alternatives hackers recommend

- [QEMU](https://hackerapproved.com/p/qemu.md): 114 recommend
- [UTM](https://hackerapproved.com/p/utm.md): 49 recommend
- [VirtualBox](https://hackerapproved.com/p/virtualbox.md): 34 recommend
- [Lima](https://hackerapproved.com/p/lima.md): 31 recommend
- [Vagrant](https://hackerapproved.com/p/vagrant.md): 25 recommend

## Cite as

Hacker Approved, "User Mode Linux", https://hackerapproved.com/p/user-mode-linux/ (counts from 1,795,640 Hacker News comments, November 2025 to November 2026).