Linux Fish Guide

Linux Fish Guide

Complete beginner-friendly guide to Fish shell on Linux, covering Arch Linux, CachyOS, and other distributions including installation, configuration, and Fish-specific features.

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Table of Contents

1. Fish Installation
2. Fish Configuration
3. Fish Features
4. Fish Functions
5. Troubleshooting

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Fish Installation

Install Fish

Arch/CachyOS:

# Install Fish
sudo pacman -S fish

# Install fish-friendly-command
sudo pacman -S fzf

Debian/Ubuntu:

sudo apt install fish

Fedora:

sudo dnf install fish

Set as Default

Change shell:

# Change to Fish
chsh -s /usr/bin/fish

# Or just launch
fish

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Fish Configuration

Configuration File

Edit config:

# Create config
vim ~/.config/fish/config.fish

Basic Settings

Common settings:

# Set PATH
set -gx PATH $PATH ~/bin

# Aliases
alias ll 'ls -alF'
alias la 'ls -A'
alias l 'ls -CF'

# Prompt
function fish_prompt
    echo (pwd) '> '
end

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Fish Features

Auto-completion

Fish provides:

• Automatic: Built-in completion
• Suggestions: Command suggestions
• Syntax highlighting: Real-time highlighting

History

History features:

• Search: Ctrl+R
• Autocomplete: Tab
• Shared history: Across sessions

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Fish Functions

Create Functions

Define function:

# In config.fish
function greet
    echo "Hello, $argv[1]!"
end

Use Functions

Call function:

# Use function
greet "World"

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Troubleshooting

Fish Not Working

Check installation:

# Check Fish
which fish
fish --version

# Install if missing
sudo pacman -S fish

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Summary

This guide covered Fish installation, configuration, and features for Arch Linux, CachyOS, and other distributions.

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Next Steps

• Shell Configuration - Shell setup
• zsh Guide - zsh shell
• Fish: https://fishshell.com/

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This guide covers Arch Linux, CachyOS, and other Linux distributions. For distribution-specific details, refer to your distribution's documentation.