su hadf, what's default password?

[#1]

at http://ko.hortonworks.com/hadoop-tutorial/a-lap-around-apache-spark/

When sudo su hdfs, system require spark password. what's the defualt password of hdfs and spark?

[#2 · Accepted solution]

@Osoeng Kwon , hdfs and spark user do not have any password. You should run su hdfs and su spark from root user. It would not ask your password then.

[#3]

from root user I submit 'su hdfs', then t would not ask to me. Thank u!!