Bash vs. – Most Linux users start in Bash, but Fish turns the command line into something that feels less like guessing and more like guidance—through suggestions, color cues, and shortcuts.
There’s a moment every Linux user recognizes: you type a command, hit Enter, and then stare at the screen waiting to see if you’ll be punished for a typo. Bash mostly accepts whatever you throw at it and tries to run it—no hand-holding, no coaching.
Fish, the Friendly Interactive SHell, runs differently. The first time you start typing in Fish, it offers suggestions based on your history. When the suggestion you want appears—say you begin with ssh and Fish proposes ssh 192.168.1.26—you can accept it with the right-pointing arrow key and then press Enter. It’s small, but it changes the mood of using the terminal.
Most Linux distributions default to the Bash shell, which stands for Bourne Again Shell. Why “Bourne”?. Because Bourne shell was the first shell, and Bash is presented here as an improvement on that. Bash can be used to write bash scripts that can do just about anything. and it has been around for a very long time. The promise of Fish is that it brings features Bash has neglected—without changing the fundamentals of how the shell helps you communicate with the kernel.
The shell is essential in Linux. The Linux shell enables communication with the kernel by interpreting commands so the kernel can understand and use them. Without the shell, commands wouldn’t work, and applications wouldn’t work either. In other words, you’re not just choosing a “prettier” terminal experience. You’re choosing how the command line helps—or doesn’t help—you move from intention to execution.
Fish vs. Bash in everyday use comes down to feedback. Bash doesn’t help you; it accepts the command and attempts to run it. Fish, by contrast, offers real-time support. It uses colors to steer you. If you type an invalid command, Fish colors it red. If you alter an invalid command so it becomes valid, it turns blue. Even file paths get the same treatment: as you type a file path it appears red. and once the path is valid it turns blue.
Press Tab in Fish and you’ll see several suggestions. From there, you can use arrow keys to scroll through the list and select the command you want to run.
Fish also changes the feel of how you express subcommands. In Bash, you use back ticks (`) to indicate a command, which can be confusing. In Fish, commands go in parentheses like echo (whoami) in (pwd). Using those examples produces results such as jack in /home/jack.
Then there’s the way Fish handles variables. You can set variables in Fish with the set command—for example:set name jack—then use that variable like echo “My name is $name”. The response is My name is jack.
If you want shortcuts, Fish can do that too. It lets you set abbreviations for commands, similar to aliases in Bash. For example. if you use the git checkout command a lot and want a quicker path. you can create an abbreviation gco for that command with:abbr –add gco git checkout. You can also set ssh abbreviations, like:abbr –add ssh11 “ssh 192.168.1.11” and abbr –add ssh12 “ssh 192.168.1.12”. After that, typing ssh11 connects to 192.168.1.11, and typing ssh12 connects to 192.168.1.12. Importantly, the abbreviations remain after logging out.
Fish even includes a calculator built in. You can type math 5020/220, and the answer—22.818182 in the example—will be presented at the prompt.
Installing Fish is straightforward because it lives in standard repositories. On Ubuntu, the command is sudo apt-get install fish -y. On Fedora, it’s sudo dnf install fish -y. On Arch, it’s sudo pacman -S fish.
After installing, you set Fish as the default shell with:chsh -s $(which fish). If you try Fish and decide you want to go back, you can switch back to Bash with:chsh -s $(which bash).
For readers who bounce off the terminal because it feels like a test every time they type. Fish’s pitch lands plainly: Bash accepts commands; Fish helps you get them right. In a workflow where one wrong character can send you down the wrong path. the promise of a shell that works with you—rather than just for you—isn’t theoretical. It’s right there, every time you start typing.
Linux shell Bash Fish shell Friendly Interactive SHell command line terminal Ubuntu Fedora Arch chsh abbreviations variables
So fish is like training wheels for Linux? Cool I guess.
I tried switching to Fish once and it messed up my colors or whatever and I panicked. Bash at least just works, right? But this article makes it sound like Bash is mean for no reason lol.
Wait, are they saying Fish talks to the kernel better than Bash? Because I thought that was the same either way, like the kernel is the kernel. Also “Bash accepts whatever you throw at it” sounds like a security thing, so maybe Fish is safer? Not sure, I just skimmed the ssh part.
Honestly I don’t care what it’s called, Bourne, Bash, Fish… it’s all just commands. I use Linux for like one thing (streaming and updates) and I’m already lost, so suggestions sounds nice. The arrow key accepting ssh 192.168.1.26 tho? That feels like it could get you into the wrong place if you fat-finger a number. Then again Bash probably would just run it and punish you so… yeah I guess guidance is better than guessing.