I really do not know why I did not check out Drush earlier. It is a command-line interface to comfortably maintain your Drupal-based website. Labeled by its creators as “veritable Swiss Army knife” it can virtually do any administrative tasks that you can think of. And this within a fraction of the time that you would usually spend to execute each single step via the original user interface of Drupal.
As prerequisite you should have a well setup Drupal installation. If not for example updating Drupal’s core might not work out well and even screw up your site. After installing Drush you can easily verify this by running the command
The current stable release of Drush is 8.1.12 and requires PHP 5.4.5 or later. It supports Drupal 6.X, 7.X, and 8.X.
The installation is straight forward and explained well in the official documentation.
The most annoying task for myself was always having to manually update Drupal core, especially when there are urgent security updates.
With Drush it is as easy as that (original description):
drush vset --exact maintenance_mode 1 && drush cache-clear all && drush pm-update && drush vset --exact maintenance_mode 0 && drush cache-clear all