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Cypress failed to start after running npm run cypress:run 

Either the command line exits immediately without running any test or it logs out like the following.

Error message 
✖  Verifying Cypress can run /Users/user/Library/Caches/Cypress/3.1.3/
   → Cypress Version: 3.1.3
Cypress failed to start.

This is usually caused by a missing library or dependency.

Clear node options by initiating unset NODE_OPTIONS in the command line. Running npm run cypress:run should proceed with Cypress testing.

Error message 

This error may occur in Ubuntu when running any Cypress spec.

code: 'ENOSPC',
errno: 'ENOSPC',

Run the following command

echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p