🪄 Make Your Linux Terminal Look Amazing

Using Fish Shell + Oh My Posh

While the default Linux terminal prompt can be a bit plain, you can easily transform it into something beautiful and informative.
This documentation will guide you through setting up the Fish shell with Oh My Posh to create a powerful, visually appealing, and highly personalized terminal experience.

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🐟 Introduction

Fish shell (Friendly Interactive Shell) is a user-friendly shell with:

• 🧠 Autosuggestions
• 🎨 Syntax highlighting
• ⚙️ Easy scripting

It’s powerful, intuitive, and perfect for both beginners and advanced users.

Oh My Posh is a universal prompt theme engine that works with any shell.
It provides stunning, customizable prompts showing details like Git status, system info, battery, and more.

After following this guide, you’ll have a fully functional, beautiful Linux terminal that reflects your style and improves productivity.
Get ready to rock your shell—with some handy aliases too!

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⚙️ Step 1: Install Fish Shell

🧩 Ubuntu / Debian / Linux Mint

sudo apt install fish -y

🧩 Fedora

sudo dnf install fish -y

🧩 Arch Linux / Manjaro Linux

sudo pamac -S fish --noconfirm

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🐚 Step 2: Change Default Shell to Fish

To make Fish your default shell:

chsh -s /usr/bin/fish

Then start Fish manually:

fish

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⚙️ Step 3: Install Oh My Posh

Download and install the latest Linux binary:

sudo wget https://github.com/JanDeDobbeleer/oh-my-posh/releases/latest/download/posh-linux-amd64 -O /usr/local/bin/oh-my-posh
sudo chmod +x /usr/local/bin/oh-my-posh

This installs Oh My Posh globally so it can be used from any shell.

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🎨 Step 4: Download and Install Fonts

Oh My Posh themes require Nerd Fonts to display icons properly.

Create fonts directory:

mkdir -p $HOME/.local/share/fonts

Download FiraCode Nerd Font:

wget https://github.com/ryanoasis/nerd-fonts/releases/download/v3.2.1/FiraCode.zip -O $HOME/Downloads/firacode.zip
unzip $HOME/Downloads/firacode.zip -d $HOME/.local/share/fonts

Update font cache:

fc-cache -f -v

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🧠 Step 5: Set Terminal Font

Change your system Monospace Text Font to FiraCode Nerd Font Mono.

If you’re using GNOME, install GNOME Tweaks:

Ubuntu / Debian / Linux Mint

sudo apt install gnome-tweaks -y

Fedora

sudo dnf install gnome-tweaks -y

Arch / Manjaro

sudo pamac -S gnome-tweaks --noconfirm

Then open GNOME Tweaks → Fonts → Monospace Text and select FiraCode Nerd Font Mono.

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🧩 Step 6: Download and Install Oh My Posh Themes

mkdir ~/.poshthemes
wget https://github.com/JanDeDobbeleer/oh-my-posh/releases/latest/download/themes.zip -O ~/.poshthemes/themes.zip
unzip ~/.poshthemes/themes.zip -d ~/.poshthemes
chmod u+rw ~/.poshthemes/*.json
rm ~/.poshthemes/themes.zip

Each .omp.json file inside this directory is a theme configuration.

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📝 Step 7: Configure Fish Shell

Edit your Fish configuration file:

Open with gedit:

gedit $HOME/.config/fish/config.fish

Or nano:

nano $HOME/.config/fish/config.fish

Add the following line at the bottom:

oh-my-posh init fish --config $HOME/.poshthemes/montys.omp.json | source

💡 Replace montys.omp.json with your desired theme.

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🌈 Step 8: Change Terminal Color Scheme

To enhance visuals, change your terminal color scheme.

Example:
Choose Everforest Dark Hard.

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🔄 Step 9: Apply and Verify

Reload your Fish configuration:

. ~/.config/fish/config.fish

If your GNOME Terminal doesn’t load Fish as the default shell, log out and back in again.
After that, your terminal will start with Fish automatically.

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👀 Step 10: Explore Themes

List all installed themes:

ls ~/.poshthemes

Preview all official Oh My Posh themes at:
👉 https://ohmyposh.dev/docs/themes

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✅ Done!

You now have Fish shell and Oh My Posh fully configured on Linux 🎉
Enjoy your beautiful, efficient, and informative terminal.

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📚 References

• Oh My Posh Official Docs
• Fish Shell Official Docs
• Nerd Fonts Repository