SSH¶

Install ssh utilities:

sudo apt-get install ssh
sudo apt-get install pdsh

vim .bashrc
  export PDSH_RCMD_TYPE=ssh

Create ssh keys and add it to local authorized_keys, to turn local machine into a node along sode of a master.

ssh-keygen -t rsa -P ""
cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
chmod 0640 ~/.ssh/authorized_keys 

sudo vim /etc/ssh/sshd_config
    #Find this line:
    #PasswordAuthentication yes
    #PermitRootLogin no
    #Change it to:
    PasswordAuthentication no
    PermitRootLogin yes

Restart the services:

sudo systemctl restart ssh
sudo systemctl restart sshd
sudo service ssh restart
sudo service sshd restart
sudo service ssh status 

Try ssh -vvv localhost, most likely it should go through or else check the logs for the error!

In the worst case, run following command and find groups associated with ur user name groups and then add one of the groups to AllowGroups in /etc/ssh/sshd_config using an editor. sudo vim /etc/ssh/sshd_config