Hadoop: require root's password after enter “start-all.sh”

Question

I have installed Hadoop and SSH on my laptop. \"ssh localhost\" works fine. After formatting HDFS, I tried to start hadoop.

munichong@GrindPad:~$ sudo /usr/         


        

Answer 1

It seems you have logged-in as root and invoking start-all.sh.

Instead, login as owner of directory $SPARK_HOME and invoke spark's
start-all.sh.

(or)

Let user hadoop be the owner of directory $SPARK_HOME and currently logged in as root, then command would be as follows:

sudo -u hadoop -c start-all.sh

Assumption:
a) PATH has reference to directory $SPARK_HOME/bin
b) Certificate based authentication is configured for user hadoop