Mattermost is a popular open-source team collaboration platform that offers features such as messaging, file sharing, and integrations with other tools. In this article, we will go over the steps for installing Mattermost on a fresh installation of Rocky Linux 8.

Before we begin, make sure you have a user that has sudo privileges on your Rocky Linux 8 system.

Install the required packages

To start, we need to install the required packages for Mattermost. These include the wget and unzip utilities, as well as the PostgreSQL database server. To install these packages, run the following command:

sudo dnf install -y wget unzip postgresql-server postgresql-contrib

After the installation is complete, initialize the PostgreSQL database and enable it to start automatically on boot:

sudo postgresql-setup --initdb
sudo systemctl enable postgresql

Start the PostgreSQL service:

sudo systemctl start postgresql

Create a PostgreSQL user and database for Mattermost

Next, we need to create a PostgreSQL user and database for Mattermost. To do this, first switch to the postgres user:

sudo -i -u postgres

Then, create a new user and database for Mattermost by running the following commands:

createuser mattermost -P
createdb mattermost -O mattermost

The -P option will prompt you to enter a password for the mattermost user. Make sure to remember this password, as you will need it later when configuring Mattermost.

After creating the user and database, exit the postgres user:

exit

Download and install Mattermost

Now we can download and install Mattermost. To do this, first download the latest version of Mattermost from the Mattermost website:

wget <https://releases.mattermost.com/5.29.0/mattermost-5.29.0-linux-amd64.tar.gz>

After the download is complete, extract the tarball:

tar -xzvf mattermost-5.29.0-linux-amd64.tar.gz

Change into the extracted directory and run the installation script:

cd mattermost
sudo ./bin/mattermost setup

The setup script will guide you through the installation process. It will ask you for the database information, as well as the URL and port for the Mattermost server. Make sure to enter the correct information for your setup.

After the installation is complete, start the Mattermost service:

sudo systemctl start mattermost

4. Access Mattermost

After the installation is complete, you can access Mattermost by visiting the URL http://your-server-ip:8065 in a web browser. You will be prompted to create an administrator account, which you can use to log in and access the Mattermost dashboard.

5. Configure the firewall

If you have a firewall enabled on your system, you will need to allow access to the Mattermost port (8065) in order to access it from a remote machine.

To do this, run the following commands to open port 8065 and reload the firewall rules:

sudo firewall-cmd --permanent --add-port=8065/tcp
sudo firewall-cmd --reload

Conclusion

In this article, we went over the steps for installing Mattermost on a fresh installation of Rocky Linux 8. We installed the required packages, created a PostgreSQL user and database for Mattermost, downloaded and installed Mattermost, and accessed the Mattermost dashboard. We also covered how to configure the firewall to allow access to Mattermost.

I hope this tutorial has been helpful for you. Happy collaborating with your team!