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Advice on migrating from Ubuntu server to another server OS
(sh.itjust.works)
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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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For a server os, do things like consider stability and ease of upgrading between major versions.
Debian does both of those things extremely well.
If you're playing around with changing distros and your data is valuable, I'd try and find somewhere to back it up to, myself.