Here is my shell script which i wrote to make the process of installing the IBM biginsight (hadoop) on the lab. My team installed the hadoop using this script for around 70 systems, it saved lots of time for us, and we successfully conducted the workshop on it today. #!/bin/bash #generating keygen for the root user with no password ssh-keygen -f $HOME/.ssh/id_rsa -t rsa -N '' echo "key generated in $HOME" #append it to the authorized_keys cat $HOME/.ssh/id_rsa.pub >> $HOME/.ssh/authorized_keys echo "appended to authorized_keys" #create a usergroup