Not able to execute any hdfs commands on HDP sandbox.
[root@sandbox-host ~]# sudo su - hdfs
su: user hdfs does not exist
Can you double check if you have used the correct port 2222 to login to Sandbox? (Sandbox runs inside docker container hence the SSH port is mapped to 2222)
# ssh email@example.com -p 2222 Enter Password: hadoop
Or use the Http Based WebClient terminal to login to Sandbox:
After using the correct SSH port you should be able to use the hadoop commands and should be able to see all the users.