this post was submitted on 17 Feb 2026
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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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Thanks! I guess something like vim would count as a TUI then.
I’d say vi is in a fuzzy grey area below a tui. It’s more than a cli but shares a lot with cli programs; it pretty much has its own command line built in. At the same time it has nothing like dialog box or menus like normal tui programs.
Personally, I feel that if it uses control characters to update the screen in previous positions, altering the scroll buffer, moving beyond where the cursor is and redrawing the screen, then it's a TUI.
CLI programs only output plain text in a stream, using just control characters for coloring and formatting, and if they do any re-drawing it's only for the current line (eg. progressbars and so).
So.. even something like
lessis a TUI program.. but things likemoreorsedwould be CLI programs.Fair enough. I’d never consider less to be a TUI program.
Yes. Think of any terminal application with an interactive user interface, that mimics a GUI. Something that is not just controlled by commandline options like grep and sed in example.