// ITS FOSS — LINUX & OPEN SOURCE
I Tried This Rust Tool, and It Immediately Made Bash Modern
Most Linux users benefit from GNU Readline without realizing it. It is the library responsible for Bash's interactive command-line editing, providing familiar features like cursor movement, command history, and basic tab completion.
While Readline is highly configurable, Readline's completion remains relatively simple out of the box.
I came across a new tool called Flyline that takes Bash command completion to an entirely different level. No special configuration is required.
For anyone who has control over their shell environment, Flyline could become a must-have terminal tool.
Flyline takes a different approach entirely. Instead of layering on top of Readline, it replaces it outright. It is built in Rust and ratatui to render richer, more interactive terminal interfaces than Readline.
When I installed Flyline for the first time and started using it, the difference was immediately noticeable. Command suggestions appeared as I typed, making it quicker to complete commands and move through my workflow. It makes working in the terminal noticeably faster.
As soon as you start typing, Flyline displays a completion popup right next to the cursor with matching suggestions. This keeps the suggestions close to where you're working, making it easy to complete commands without breaking your typing flow.
You can cycle through the available suggestions by pressing the Tab key, with the selected entry being updated on the command line in real time. If you prefer, the Up and Down arrow keys work just as well, and the completion list can also be navigated using the mouse.
For longer lists, Flyline includes a functional scrollbar that lets you quickly jump through the available suggestions. Personally, I found it faster to keep typing and narrow down the results rather than reaching for the mouse, but it's nice to have the option.
Once you've found the suggestion you want, press Enter to insert it into the command line and close the completion popup.