what usergroup I need to setup after install ambari by root?

[#1]

I need to know

1. groups hortonworks for their user.

2. installed everything by root user, is any file, (dir is file) I need to chmod, chown?

[#2 · Accepted solution]

@Robin Dong

Ambari will take care of user and group creation once you start deploying the cluster

[#3]

thank you Neeraj, so any user can log on do anything with Hortonworks without su - xxx?

[#4]

@Robin Dong The initial question was not clear. The main group is hadoop. You can setup permissions at directory and file level for users.

Check this https://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/FileSystemShell.html

Look for chmod and chown commands