1、Enter superuser mode.sudo su2、Import the public repository GPG keys:curl https://packages.microsoft.com/keys/microsoft.asc | apt-key add -3、Register the Microsoft SQL Server Ubuntu repository:curl https://packages.microsoft.com/config/ubuntu/16.04/mssql-server.list > /etc/apt/sources.list.d/mssql-server.list4、Exit superuser mode.exit5、Run the following commands to install SQL Server:sudo apt-get updatesudo apt-get install -y mssql-server6、After the package installation finishes, run the configuration script and follow the prompts.sudo /opt/mssql/bin/sqlservr-setup7、Once the configuration is done, verify that the service is running:systemctl status mssql-server