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Celeste – New GTK4 App for Sync Google Drive, Dropbox, Owncloud & other Cloud Storage in Linux

Want to sync your local folder with a cloud storage? A brand new modern GTK4 application is under development now!

It’s ‘Celeste‘, a free and open-source graphical application aims to sync any cloud provider. The app uses rclone as backend to support 2-way sync. And so far it supports for adding sync for the following services:

  • Google Drive.
  • Dropbox.
  • Nextcloud.
  • Owncloud.
  • WebDAV.
Most Linux today support mounting Google Drive, see this tutorial for details.

By using GTK4 and LibAdwaita toolkit, it has a modern look and feel in Ubuntu, Fedora, and other Linux with GNOME desktop. And, it switches UI color (light/dark) automatically depends on system-wide color scheme.

The app supports adding multiple cloud providers at the same time in a single window. As well, it has an indicator applet in system tray to do quick actions for app window and file synchronization.

After setting up the local folder and cloud folder synchronization via this application window, user can finally write and access remote files easily from in file manager.

How to Install Celeste in your Linux

NOTE: This app is still in early development stage! It may have bugs. Use it at your own risk!

Celeste is available to install in most Linux through 3 package formats so far: Flatpak, Snap, and Deb.

Option 1: Snap package

For Ubuntu 20.04, Ubuntu 22.04 and higher users, the app is easy to install by directly searching from Ubuntu Software. Though, it’s a snap package runs in sandbox.

Install Celeste in Ubuntu Software

Other Linux can get the snap by going to this web page.

Option 2: Flatpak package

Flatpak is another universal Linux package runs in sandbox. Most Linux can install the app as Flatpak by following the steps below one by one. And, Linux Mint 21 user can even install the package directly from Software Manager.

  1. Install Flatpak daemon. For Ubuntu, press Ctrl+Alt+T on keyboard to open terminal. When it opens, run command to enable Flatpak:
    sudo apt install flatpak

    Other Linux can follow this setup guide to enable Flatpak support.

    Enable Flatpak support in Ubuntu
  2. After enabling Flatpak, most Linux can run this single command in a terminal window to install Celeste:
    flatpak install

Option 3: Classic .deb package

For Ubuntu user prefer the classic .deb package format, there’s also an official apt repository available. Though, it supports only Ubuntu 22.10 and higher.

  1. Firstly, press Ctrl+Alt+T on keyboard to open a terminal window. Then run command to install the keyring:
    curl -q '' | gpg --dearmor | sudo tee /usr/share/keyrings/prebuilt-mpr-archive-keyring.gpg 1> /dev/null

    Run sudo apt install curl if command ‘curl’ does not exist. And, if the command stuck at blinking cursor, type user password and hit Enter to continue.

  2. Then, add the repository to your system by running command:


    echo "deb [arch=amd64 signed-by=/usr/share/keyrings/prebuilt-mpr-archive-keyring.gpg] prebuilt-mpr $(lsb_release -cs)" | sudo tee /etc/apt/sources.list.d/prebuilt-mpr.list

    NOTE: here $(lsb_release -cs) returns system codename. For Ubuntu based systems, you need to replace it with kinetc (22.10’s codename) or lunar (23.04’s codename) depends on which Ubuntu edition your system is based on.

  3. And update the system package index via command:
    sudo apt update
  4. Finally, install the Celeste package as native .deb package:
    sudo apt install celeste

When everything is done successfully, search for and open the cloud file synchronization tool from application launcher and enjoy!

Uninstall Celeste

Depends on which package you installed for this application, choose running one of the commands below.

For snap package, either use Ubuntu Software or open terminal and run command:

snap remove --purge celeste

For Flatpak package, open terminal and run command:

flatpak uninstall --delete-data com.hunterwittenborn.Celeste

And for the classic .deb package, use the command below to remove it:

sudo apt remove --autoremove celeste

Also remove the apt repository source file via command:

sudo rm /etc/apt/sources.list.d/prebuilt-mpr.list

And remove the keyring file via:

sudo rm /usr/share/keyrings/prebuilt-mpr-archive-keyring.gpg

That’s all. Enjoy!

Hi, I'm Merilyn Ne, a computer geek working on Ubuntu Linux for many years and would like to write useful tips for beginners. Forgive me for language mistakes. I'm not a native speaker of English.