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
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