Fastfetch Random Logo Selector

A Bash script that automatically changes the ASCII logo and associated colors in Fastfetch every time a Konsole terminal is opened.

The script randomly selects a logo from a JSON list, applies its associated color scheme, and launches Fastfetch automatically through .bashrc.

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Features

• 🎲 Random Fastfetch logo selection
• 🎨 Custom color palette per logo
• 🖼️ Support for custom ASCII logos
• 🚀 Automatic execution when opening Konsole
• 🐧 Compatible with Nobara 44 / Fedora and other Bash-based Linux distributions
• ⚡ No permanent modification of config.jsonc
• 🔒 Prevents accidental Fastfetch configuration corruption

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Directory Structure

The expected file structure is:

~/.config/fastfetch/
│
├── config.jsonc
│
├── random-fastfetch.sh
│
└── logos/
    │
    ├── list.json
    ├── logo1.txt
    ├── logo2.txt
    ├── logo3.txt
    └── ...

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Installation

1. Install dependencies

The script uses jq to read JSON files.

On Nobara/Fedora:

sudo dnf install jq

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2. Create directories

mkdir -p ~/.config/fastfetch/logos

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3. Add your ASCII logos

Place your custom ASCII files inside:

~/.config/fastfetch/logos/

Example:

logo1.txt
logo2.txt
logo3.txt

Each file should contain only the ASCII art.

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Logo Configuration

Create the file:

~/.config/fastfetch/logos/list.json

Example:

{
  "logos": [
    {
      "path": "/home/neon/.config/fastfetch/logos/logo1.txt",
      "colors": {
        "1": "blue",
        "2": "cyan"
      }
    },
    {
      "path": "/home/neon/.config/fastfetch/logos/logo2.txt",
      "colors": {
        "1": "red",
        "2": "yellow"
      }
    },
    {
      "path": "/home/neon/.config/fastfetch/logos/logo3.txt",
      "colors": {
        "1": "green",
        "2": "white"
      }
    }
  ]
}

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Configuration Format

path

Defines the location of the ASCII logo:

"path": "/home/neon/.config/fastfetch/logos/logo1.txt"

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colors

Defines the Fastfetch logo color mapping:

"colors": {
    "1": "blue",
    "2": "cyan"
}

The numbers correspond to Fastfetch color markers inside the ASCII file.

Example:

$1████████
$2██ NOBARA ██

Result:

• $1 → blue
• $2 → cyan

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Script Installation

Create the script:

nano ~/.config/fastfetch/random-fastfetch.sh

Add:

#!/bin/bash

FASTFETCH_DIR="$HOME/.config/fastfetch"
LIST="$FASTFETCH_DIR/logos/list.json"

COUNT=$(jq '.logos | length' "$LIST")

INDEX=$((RANDOM % COUNT))

LOGO=$(jq -r ".logos[$INDEX].path" "$LIST")

COLOR1=$(jq -r ".logos[$INDEX].colors[\"1\"]" "$LIST")
COLOR2=$(jq -r ".logos[$INDEX].colors[\"2\"] // empty" "$LIST")

fastfetch \
--logo-type file \
--logo "$LOGO" \
--logo-color-1 "$COLOR1" \
${COLOR2:+--logo-color-2 "$COLOR2"}

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Make the script executable

chmod +x ~/.config/fastfetch/random-fastfetch.sh

Test it manually:

~/.config/fastfetch/random-fastfetch.sh

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Automatic Launch with Konsole

Edit your Bash configuration:

nano ~/.bashrc

Add at the end:

# Random Fastfetch logo on Konsole startup

if [[ $- == *i* ]]; then
    ~/.config/fastfetch/random-fastfetch.sh
fi

From now on, every time Konsole starts:

1. Bash loads .bashrc
2. The script runs
3. A random logo is selected
4. The associated colors are applied
5. Fastfetch displays the result

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Troubleshooting

Permission denied

Error:

Permission denied

Fix:

chmod +x ~/.config/fastfetch/random-fastfetch.sh

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Invalid JSON error

Check your JSON file:

jq . ~/.config/fastfetch/logos/list.json

If the file contains syntax errors, jq will display the problematic line.

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Fastfetch does not display the logo

Test manually:

fastfetch \
--logo-type file \
--logo ~/.config/fastfetch/logos/logo1.txt

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Customization Ideas

This system can easily be extended:

• Add new logos by dropping additional .txt files
• Create custom color themes
• Add distribution-specific logos
• Change themes depending on time of day
• Select logos depending on GPU or KDE Plasma theme

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License

Personal Linux customization project.

Free to use and modify.