To get database table columns names of a mysql database you can use "DESCRIBE my_table;" method.

To create a bootable USB memory on linux you have several solutions. The famous dd is the most powerful solution, but use carefully. Because a very small error may destroy all your data.

Get, Set and Delete configuration value by drush

Get (drush config-get)

drush cget CONFIG_NAME CONFIG_KEY
Examples:
drush cget system.site
drush cget system.site page.front

Set (drush config-set)

If you have an error like this, when you use a custom views filter plugin, the resent is now you need to have a config schema for all Views filter plugins.

The error :

Generate a random key.

$random_key = str_shuffle('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'); // 62 characters
$random_key = substr($random_key, 0, 10); // 10 characters