Not able to run Hadoop daemons

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When I run the jps command:

I only see jps as the running java program in return.

When I run start-all.sh command, I receive errrors like:Connection to port 22 refused

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Hadoop start-all.sh script uses SSH for managing it's services. Looks like that your computer/cluster:

  • has no ssh daemon installed. You can install it on Ubuntu with sudo apt-get install ssh.
  • (less likely) sshd uses non-default port. Check your sshd configuration.