Our team release updates to the open source software every week, and you can find out whether new updates are available any time by running ghost check-update. If you’re already running the latest major version (6.x) - update using Ghost CLI by running 
ghost update
That’s it! If you want to be super safe, run ghost backup first.

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Updating to the latest major version (6.x)

If you’re running Ghost 5.x with MySQL 8, updating your Ghost-CLI site is still just as easy as usual, but there are breaking changes you should check out first.
The web analytics feature is not compatible with Ghost-CLI. There is a docker-based hosting method currently in preview, which includes a migration tool for Ghost CLI sites: check it out.
If you’re on an older version, or not using MySQL 8, getting up-to-date is slightly more involved. Below is a full breakdown of the the recommended update paths for older Ghost versions. Updates are recommended for sites that are:
  • Running Ghost version 3.0.0 or higher and are using MySQL in production
  • Development sites using any database
A full reinstall of Ghost is recommended for sites that are:
  • Running on a Ghost version less than 3.0.0
  • Using SQLite3 in production on any Ghost version
Ghost VersionDatabaseUpdate method
< 2.xAnyReinstall
3.x, 4.xSQLiteReinstall
3.x, 4.xMySQLUpdate
5.xMySQLUpdate
If you’re using MariaDB it is recommended to migrate to MySQL 8 - read more about supported databases.