Before you can install MariaDB 10.3, you may need to uninstall the current version of MariaDB server. You can ignore this if upgrading.  On Ubuntu, run: sudo apt-get remove mariadb-server For CentOS 7, run: sudo yum remove mariadb-server Install MariaDB 10.3 on Ubuntu 18.04 To install MariaDB 10.3 on Ubuntu 18.04, you need to add MariaDB repository on to the system. Step 1: Install software-properties-common if missing: sudo apt-get install software-properties-common Step 2: Import MariaDB gpg key: Run...

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