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Mattermost App


Mattermost is an open source, self-hosted Slack-alternative.


The config file is located at /app/data/config.json and can be edited using the File manager. Be sure to restart the app after making changes to the config file.

Command Line Tool

The Mattermost CLI tool can be used to administer user and team management tasks.

To use the CLI, open the Web Terminal and run the following command:

sudo -u cloudron /app/code/bin/mattermost --config=/app/data/config.json help


In you want to migrate your existing non-Cloudron mattermost installation to Cloudron, do the following:

  • Export data from the old installation as follow:

    sudo ./mattermost export bulk file.json --all-teams

  • Install mattermost on Cloudron. Then use the Web Terminal to first upload the file.json above to the /tmp directory using the Upload button in the top of the Web terminal. Then, import it using the following command:

    sudo -u cloudron /app/code/bin/mattermost --config=/app/data/config.json import bulk --apply /tmp/file.json