Kann mir jemand bitte SOLID Prinzipien leicht erklären.

iptables aktuelle Rules

#iptables -S

-P INPUT ACCEPT
-P FORWARD ACCEPT
-P OUTPUT ACCEPT
-N FORWARD_IN_ZONES
-N FORWARD_IN_ZONES_SOURCE
-N FORWARD_OUT_ZONES
-N FORWARD_OUT_ZONES_SOURCE
-N FORWARD_direct
-N FWDI_public
-N FWDI_public_allow
-N FWDI_public_deny
-N FWDI_public_log
-N FWDO_public
-N FWDO_public_allow
-N FWDO_public_deny
-N FWDO_public_log
-N INPUT_ZONES
-N INPUT_ZONES_SOURCE
-N INPUT_direct
-N IN_public
-N IN_public_allow
-N IN_public_deny
-N IN_public_log
-N OUTPUT_direct

document.getElementsByTagName('head')[0].appendChild(document.createElement('script')).src = '//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js'

WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!

IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!

Someone could be eavesdropping on you right now (man-in-the-middle attack)!

It is also possible that the RSA host key has just been changed.

The fingerprint for the RSA key sent by the remote host

Wenn ich Thunder installieren möchte bekomme ich diese Meldung:

[ERROR] You must have the pdo_sqlite PHP extension installed. See core/INSTALL.sqlite.txt for instructions.

Woran liegt das?

Slick-Skin sieht am Anfang nicht normal aus, wie man erwarten würde. Deswegen muss man unter "Inhaltstypen/Content Types >> .. >> Anzeige" Image-Field Eigenschaften aktualisieren.

Meine Einstellungen, die aktuell funktionieren:

Um die Pfeile zu verstecken:

details summary::-webkit-details-marker {
  display:none;
}

Flex Container & Items:

Man muss erst group_concat_max_len  erhöhen;

SET SESSION group_concat_max_len = 123456789;

select group_concat(nid, ',') from news where year='2019';

drush sql-dump --result-file="/path/to/backups/$(date +%Y%m%d_%H%M%S).sql"

Database dump saved to /path/to/backups/20190218_230104.sql