Upgrading your Drupal 9 base system in two ways
There have been several base system updates for Drupal 9 CMS in recent weeks, so it's worth reviewing its update mechanism as before for the Drupal 8 update. In this description, I'm going to update the Drupal 10 website installed on the Debian 9 (Buster) perfect server from 9.1.2 to 9.1.4, so here we now jump to several versions at once. There are two ways to do this: first with a composer, and then look at the manual update.