RJ TextEd is not available for Linux but there are plenty of alternatives that runs on Linux with similar functionality. The best Linux alternative is Visual Studio Code, which is free. If that doesn't suit you, our users have ranked more than 100 alternatives to RJ TextEd and many of them are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to RJ TextEd are Sublime Text (Free Personal), Vim (Free, Open Source), VSCodium (Free, Open Source) and Geany (Free, Open Source).
VS Code is more than just a code editor, it provides the tools and extensions to compile, debug, compare, refactor, and even manage code repositories all within a highly-customised development environment.
GNU nano is a small and friendly text editor. Besides basic text editing, nano offers many extra features like an interactive search and replace, go to line and column number, auto-indentation, feature toggles, internationalization support, and filename tab completion.
Bluefish is a powerful editor targeted towards programmers and webdesigners, with many options to write websites, scripts and programming code. Bluefish supports many programming and markup languages, and it focuses on editing dynamic and interactive websites.
CudaText is a cross-platform text editor, written in Lazarus. It starts quite fast (0.5 sec with ~30 plugins on CPU Intel Core i3 3Hz). It is extensible by Python add-ons (plugins, linters, code tree parsers, external tools).