How can I know which version of Drupal is installed in my server?
use drush to know which drupal version you are using. command : drush status
Below is the list of information it will show:
Drupal version : 8.7.10
Site URI : http://default
DB driver : mysql
DB hostname : localhost
DB port : 3306
DB username : root
DB name : drupal_8_7_10
PHP binary : /usr/bin/php7.4
PHP config : /etc/php/7.4/cli/php.ini
PHP OS : Linux
Drush script : /opt/lampp/htdocs/drupal-8.7.10/vendor/drush/drush/drus
h
Drush version : 10.2.0
Drush temp : /tmp
Drush configs : /opt/lampp/htdocs/drupal-8.7.10/vendor/drush/drush/drus
h.yml
Drupal root : /opt/lampp/htdocs/drupal-8.7.10
Site path : sites/default