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Ubuntu spotted in the latest Mark Rober video
(slrpnk.net)
From Wikipedia, the free encyclopedia
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.
Community icon by Alpár-Etele Méder, licensed under CC BY 3.0
Telegram's client is also open source. The servers are not.
That's correct. If you trust the client, it's fine. Such as if your messages leave the device encrypted already. If the encryption is handled by the server tho, its license does not matter in any way, they can do whatever they want with it. I know telegram has two communication modes, and if you trust the E2E one then all should be well. (I don't know how great Telegram's client-side encryption is)
I'm not defending Telegram here, I don't really trust it, but all that matters in encrypted communication in general is whether the client app is secure and no sensitive data leave it unencrypted.