How To Install Cutefish Desktop on Ubuntu: Step-by-Step Guide

Cutefish is a Linux desktop environment designed to look clean, modern, and simple — similar in spirit to macOS-style layouts. Instead of replacing your whole operating system, you install it on top of Ubuntu, alongside other desktops like GNOME or KDE.

This FAQ walks through how to install Cutefish on Ubuntu, what you should know before you start, and which factors affect whether it will run smoothly on your particular setup.

Important: The original CutefishOS project has slowed and some parts may be unmaintained. That doesn’t mean it’s unusable, but you should go in expecting a few rough edges and be cautious on production systems.

What Is Cutefish Desktop on Ubuntu?

On Ubuntu, Cutefish is:

• A desktop environment (DE): it changes how your desktop, panels, app launcher, and settings look and behave.
• Built on Qt (like KDE Plasma), aiming for a minimal, visually polished interface.
• Typically installed alongside your existing desktop so you can pick it from the login screen.

You’re not installing “CutefishOS” itself. You’re installing the Cutefish desktop packages on top of standard Ubuntu.

Before You Install: Key Requirements and Considerations

1. Ubuntu version and flavor

Cutefish works best on recent, standard Ubuntu releases such as:

• Ubuntu 22.04 LTS or 20.04 LTS
• Ubuntu 23.x may work via community packages, but with a higher risk of breakage

If you’re using a flavor like Xubuntu, Lubuntu, Kubuntu, you can still install Cutefish, but it will sit alongside XFCE, LXQt, or KDE Plasma.

2. Hardware basics

Cutefish is lighter than some full-featured desktops but not as minimal as something like LXQt. As a rough baseline:

Lower-end systems can still run it, but you may need to disable effects or keep fewer apps open.

3. System safety: backups and testing

You’re about to add a non-default desktop:

• Always update first: sudo apt update && sudo apt upgrade
• It’s wise to back up important files in case something goes wrong.
• If you rely on this machine for work, testing Cutefish in a virtual machine or on a spare PC is safer than modifying a mission-critical setup.

Option 1: Installing Cutefish from Ubuntu Repositories (If Available)

On some Ubuntu versions (and derivatives), Cutefish packages may already exist in the repositories or in an official/universe section. This is the simplest path if it’s available.

1. Update package lists

sudo apt update 

2. Search for Cutefish packages

apt search cutefish 

Look for packages like:

• cutefish-desktop
• cutefish-session
• cutefish-os-session

If you see a meta-package like cutefish-desktop or cutefish-os-session, that’s typically the one that pulls in everything you need.

3. Install the desktop package

Example:

sudo apt install cutefish-desktop 

or, if your distro names it differently:

sudo apt install cutefish-os-session 

During installation, you may be asked to choose a display manager (the login screen):

• gdm3 – GNOME’s display manager
• lightdm – lightweight and common on many flavors
• sddm – often used by KDE

You can keep your current choice; Cutefish will still appear as a session option later.

Option 2: Installing Cutefish from a PPA or Third-Party Repository

If your version of Ubuntu doesn’t have Cutefish in the main repositories, some Ubuntu releases have it via PPAs (Personal Package Archives) or community repositories.

Because PPAs change over time, the exact URL and name can differ. The general steps are:

1. Update your system

sudo apt update && sudo apt upgrade 

2. Add the PPA / repository

This usually looks like:

sudo add-apt-repository ppa:example/cutefish sudo apt update 

(Replace ppa:example/cutefish with the actual PPA string provided by the maintainer.)

Or, if using a .list file for a third-party repo, you might see instructions like:

echo "deb [signed-by=/usr/share/keyrings/cutefish.gpg] http://repo.example.com/ubuntu jammy main" | sudo tee /etc/apt/sources.list.d/cutefish.list sudo apt update 

3. Install the Cutefish desktop

sudo apt install cutefish-desktop 

Using third‑party repositories has trade‑offs:

• Pros: Access to software not in Ubuntu’s main repos.
• Cons: More reliance on the maintainer’s security and update practices.

How to Log In to the Cutefish Desktop After Installation

Once Cutefish is installed:

1. Log out of your current desktop session.
2. At the login screen, look for a session selector:
   • Often a gear icon, a small menu, or an icon near your username.
3. Click it and choose Cutefish, Cutefish Desktop, or Cutefish Session (name depends on your package).
4. Enter your password and log in.

If Cutefish doesn’t appear:

• Ensure the session file is installed (usually something like /usr/share/xsessions/cutefish.desktop).

• Reinstall the session/meta package if needed:

  sudo apt install --reinstall cutefish-desktop 

Basic Tweaks After Installing Cutefish

Once you’re in Cutefish:

• Panels and dock: You’ll typically see a bottom dock and a top bar, with a simplified menu.
• Settings: Look for a “System Settings” or similar app, where you can:
  • Change wallpaper
  • Adjust theme (light/dark)
  • Tweak fonts and some basic behavior

Because Cutefish focuses on simplicity, it offers fewer knobs and switches than something like KDE Plasma. That’s pleasant if you like minimalism, but limiting if you’re used to heavy customization.

How to Remove Cutefish from Ubuntu If You Don’t Like It

If you decide Cutefish isn’t for you, you can remove it and go back to your previous desktop.

1. Log out of Cutefish and log in to your original desktop (GNOME, XFCE, etc.).
2. Remove Cutefish packages. For example:

sudo apt remove cutefish-desktop 

If you installed from a PPA/meta package, you might also remove related packages, for example:

sudo apt autoremove 

This clears unused dependencies, but read the list carefully before confirming.

3. If you added a PPA, you can disable it:

sudo add-apt-repository --remove ppa:example/cutefish sudo apt update 

Remove or adjust any third-party repository files you added in /etc/apt/sources.list.d/ if applicable.

What Affects How Well Cutefish Runs on Ubuntu?

Several variables change your experience, even if the installation steps look the same.

1. Hardware performance

• Low‑end hardware (2 GB RAM, older CPUs) may run Cutefish but feel sluggish, especially with multiple apps open.
• Mid‑range hardware (4–8 GB RAM) generally handles it comfortably for everyday browsing, office tasks, and media.
• Integrated vs dedicated graphics: Any GPU with basic 3D acceleration can help animations feel smoother, but Cutefish doesn’t require high‑end graphics cards.

2. Ubuntu version and desktop mix

• Running Cutefish alone versus alongside other desktops can affect:
  • Session stability
  • Login manager behavior
  • Default application settings
• Older Ubuntu versions might have outdated dependencies, while very new versions can expose compatibility gaps if Cutefish hasn’t been updated to match.

3. Your technical comfort level

• If you’re comfortable with terminal commands and editing config files, you’ll have an easier time troubleshooting:
  • Session not appearing at login
  • Missing themes or icons
  • Conflicts with display managers
• If you prefer purely graphical tools, installing and especially removing a non-standard desktop may feel more risky or confusing.

4. How you use your system

Cutefish is designed for everyday desktop use:

• Web browsing, email, documents, media playback
• Simple, uncluttered workflows

However, certain use cases add complexity:

• Multi-monitor setups: You may find limitations or quirks in display settings compared to more mature desktops.
• Advanced window management: Tiling, complex shortcuts, or heavy customization may be more limited.
• Specialized tools: Some system configuration tools assume GNOME, KDE, or other mainstream desktops and may not integrate perfectly.

Who Might Enjoy Cutefish on Ubuntu vs. Who Might Not

Different user profiles see Cutefish differently.

Users who often appreciate Cutefish

• Minimalists who like a clean, distraction‑free desktop.
• People coming from macOS‑style interfaces who enjoy a dock and simple menus.
• Users who primarily run a few core apps and don’t need complex window management or advanced desktop features.

Users who sometimes feel constrained by Cutefish

• Power users who want deep customization, tiling, or scripting at the desktop level.
• People with complex workflows: many workspaces, custom panels, specialty system tools.
• Those who need maximum stability and long‑term support, especially in professional or production environments.

The Missing Piece: Your Own Ubuntu Setup and Needs

You now know:

• How Cutefish works as a desktop environment on top of Ubuntu
• The main installation routes (official repos vs. PPAs/third‑party repos)
• How to log in, tweak, and remove the Cutefish desktop
• The variables that change how smooth or reliable it feels: hardware, Ubuntu version, other desktops installed, and how you actually use your machine

What’s not in any generic guide is the exact combination of:

• Your hardware specs
• Your Ubuntu release and flavor
• Which apps and workflows you rely on every day
• How comfortable you are tweaking and troubleshooting

Those details determine whether installing Cutefish on your particular Ubuntu system feels like a refreshing new interface or an experiment better kept in a virtual machine.