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Where to "practice Linux" terminal commands
(lemdro.id)
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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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I will repeat it once again... Why would you use subpar Type 2 virtualization and DKMS with VirtualBox when there's a perfectly viable UI for the kernel's built-in Type 1 hypervisor (Qemu being the userland): https://virt-manager.org/
I'm not the biggest fan of VBox either, it's just very popular and full of sequential "wizards" to guide the user along the process of creating VMs, so it might be one way to get started. I'd much rather work with QEMU though.
Virt-manager is a complete full UI for Qemu (and lxc and Xen) which works essentially the same way. It's been around since 2009.