Code:

 find / -name art  2>&1 | grep -v "Permission denied"

service solr status

https://lucene.apache.org/solr/guide/8_5/taking-solr-to-production.html

*** [WARN] *** Your open file limit is currently 1024. It should be set to 65000 to avoid operational disruption.

If you no longer wish to see this warning, set SOLR_ULIMIT_CHECKS to false in your profile or solr.in.sh

Problem:

# composer update --dry-run


Loading composer repositories with package information
Updating dependencies (including require-dev)


  [RuntimeException]
  Could not load package drupal/recaptcha in https://packages.drupal.org/8: [UnexpectedValueException] Could not parse version constraint dev: Invalid version string "dev"



  [UnexpectedValueException]
  Could not parse version constraint dev: Invalid version string "dev"

Lösung:

composer self-update --rollback

Firefox Developer Tools > Console :

(function($){

$("input[id^=edit-field-image]").val('Amsterdam im Sommer');

})(jQuery);

Als ich das System (Drupal 8.9.3) auf Devel 4.0 updaten wollte, habe ich folgenden Fehler erhalten:

[error]   (Currently using Missing or invalid module Array)

Wenn man mehrere Dateien und Ordner sicher hochladen möchte:

rsync -avH /var/my/local/directories/ -e ssh remote-username@remote-server.example.com:/var/www/vhosts/remote_directory_example1

Achtung: Alle Tabellen in DB werden ohne Warnung / Bestätigung gelöscht!

drush sql:drop -y && drush sql:cli < ../backup/my_db.sql

Controller könnte so aussehen:

Composer Problem: