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3- ENABLE ROOT-SSH ACCESS + create a root password ( to all nodes )

sudo su
passwd   #( contrail1 )
##sed -e 's/#PermitRootLogin yes/PermitRootLogin yes/g' -e 's/PasswordAuthentication no/PasswordAuthentication                  yes/g' /etc/ssh/sshd_config 

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#more /etc/ssh/sshd_config | grep PasswordAuthentication

service sshd restart 
yum install git epel-release -y
exit

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