Max Trinidad walks through restoring a SQL Server database to a new Linux instance:
So, before you start working or trying to restore your Windows SQL Databases to SQL Server on Linux, there are a few things you may need to do. This will involved installing components which are not installed by default when first build your Linux System.
One thing I had to say with confidence! You WILL find all your answer on the internet. Any of the Linux Distro forum have your resolution to any of the issue you may encountered. Also, most of the time you Linux system will tell you (or gives a tip) what do with missing dependencies.
Other than that, there are Linux Application Updater solution to help keep your system up-to-date.
This is an amazing time to be in the SQL Server space.