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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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Alternatives to VirtualBox? (lemm.ee)

submitted 1 week ago by [email protected] to c/[email protected]

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VirtualBox is ridiculously simple to set up and get virtual machines going. Shared folders, shared clipboard and much more are no issue.

But.

It eats resources. The installed virtual machines (VM) run relatively slow. What have you found to be feature comparable - and most importantly more resource-efficient - alternatives for running VMs under Linux?

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[–] [email protected] 13 points 1 week ago* (last edited 1 week ago) (5 children)

As jet points out, QEMU for actual hardware virtualisation.

There is one relevant thing, which is not exactly in the same category, but does somewhat similar thing:
containers
most popular example being Docker
https://en.wikipedia.org/wiki/Containerization_(computing)
containers don't emulate whole hardware stack like virtual machines do, they just run the guest OS on top of host OS.
so because they don't put resources towards emulating hardware, they are much more resource efficient.
so if your problem is "I'm running Fedora but I want to run something that for some reason runs just on Ubuntu", then you could use containers for that.
containers are mostly used in headless environments (as in servers, no GUI), so running and displaying desktop Linux inside them is a bit tricky, but it can be done.

[–] [email protected] 3 points 1 week ago* (last edited 1 week ago)

for running GUI app, I use flatpak which is a sort of a container / sandbox

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