How sequelize-cli runs a single seeder

in sequelize-cli, sequelize db:seed:all executes all seeder in the seeders folder.
if you only want to execute a certain seeder, such as the 20180906061439-user2.js file, how do you write it on the command line?

$ sequelize --help

Sequelize CLI [Node: 8.9.0, CLI: 3.2.0, ORM: 4.8.0]

WARNING: This version of Sequelize CLI is not fully compatible with Sequelize v4. https://github.com/sequelize/cli-sharpsequelize-support

Commands:
  db:migrate                        Run pending migrations
  db:migrate:schema:timestamps:add  Update migration table to have timestamps
  db:migrate:status                 List the status of all migrations
  db:migrate:undo                   Reverts a migration
  db:migrate:undo:all               Revert all migrations ran
  db:seed                           Run specified seeder
  db:seed:undo                      Deletes data from the database
  db:seed:all                       Run every seeder
  db:seed:undo:all                  Deletes data from the database
  db:create                         Create database specified by configuration
  db:drop                           Drop database specified by configuration
  init                              Initializes project
  init:config                       Initializes configuration
  init:migrations                   Initializes migrations
  init:models                       Initializes models
  init:seeders                      Initializes seeders
  migration:generate                Generates a new migration file  [aliases: migration:create]
  model:generate                    Generates a model and its migration  [aliases: model:create]
  seed:generate                     Generates a new seed file  [aliases: seed:create]

Options:
  --version  Show version number  [boolean]
  --help     Show help  [boolean]

it shows that the db:seed command runs a certain seeder, but how exactly should I use it?