How to use cloud lab for demo examples in course?

Hi All,

I am using LMS for self study course material for Big Data and Analytic. In course they have demos which we can perform in cloud lab. I tested one for Hadoop Deployment last demo and wrote the below command :
Demo Commands :

View attachment 195

Same Demo Commands by Me

View attachment 196

Could you please guide me that what am I doing wrong?

Regards
Gursharanjit