npm install cypress or npm install cypress --save-dev // Make sure that you have already run npm init ./node_modules/.bin/cypress open //to open cypress window, will take 30 secs
cypress run all files in folder
I think you're looking for --spec path/to/folder/*.js You can run all the tests in a folder, or even in all subfolders of a folder example: --spec cypresss/integration/subsetA/**/*.js would run all .js files in all folders under the "subsetA" folder in cypress/integration.
open cypress window
./node_modules/.bin/cypress open // just cypress open wont work