Command line

If you have a command line, the following is available from the engine folder.

php nex1on check              is everything needed on the server
php nex1on routes             which addresses are declared
php nex1on migrate:status     whether migrations are applied
php nex1on module:list        modules and their state
php nex1on mail:test <address>  send a test email
php nex1on user:create ...    create a user account
php nex1on serve              local development server
php nex1on queue:work         process the queue (for the scheduler)
php nex1on doctor             check the engine against itself
php nex1on cache:clear        clear the page cache
php nex1on gc                 remove expired and old data

Almost none of this is required: the same can be done in the panel.

Except for one line in the hosting scheduler. Take it ready-made from the panel: System → Diagnostics → Queue. It looks like this:

*/15 * * * * curl -s https://your-site/cron/<key> >/dev/null

It does two things: it processes the email queue and, once a day, tidies up after the site: expired sessions, expired keys, old logs. It does not need a command line: cheap hosting usually has none, but almost always has a scheduler.

The engine also processes the queue by itself, at the tail of ordinary requests. That is enough for a site people visit, and not enough at night: an email to someone who has just registered will wait until the first visitor.