this post was submitted on 20 Oct 2023
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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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You can have a virtual terminal program to run text-based programs on the local system. On Linux, alacritty, xterm, urxvt, kitty, gnome-terminal, konsole, and the Linux kernel's native virtual terminals all can do this. They have nothing to do with remote communication. They're just pretending to be a traditional (non-virtual) terminal, something like this. You used to plug a bunch of those dumb terminals directly into a single (extremely expensive) computer to let many people share it. Those are pretty much gone, but we still provide virtual terminal software that emulates it. It deals with stuff like scrolling text on the window and colorizing it.
Inside those terminal emulators, you can run text-based programs. One text-based program that you might run is a text-based ssh client, like OpenSSH. That'll deal with securely connecting to another host over the Internet, authenticating, and encrypting data between the two.
You can also have a single software package that provides both a terminal emulator and an ssh client, which is more-common on, say, Windows. PuTTY is an example of this. ConnectBot on Android.
I think that all the platforms I know of provide some way of doing both the separate terminal emulator program/text-based ssh client and the combined model. Windows, Linux, Android, MacOS. But historically, Unix has had a considerably-nicer text-based environment than Windows, so I suspect that more users on Windows use combined ssh/virtual terminal programs, because they're rarely using text-based programs on their local system.
Thank you, that helps clear it up. I was certainly conflating the two previously. This makes sense now.