I have a deployed Sencha web application on an EC2 instance and the database is running on RDS AWS. Now the application gives me an error that:

 Refresh required to update application

I know there is a command by Sencha Cmd sencha app refresh from this Link, but I don't know how to run this command on an already deployed application.

Is there a way to open a cmd command window like windows but on AWS to execute this command? Can you please help?

The EC2 instance is an Ubuntu 16.04.6 LTS machine.