Why the sshd service is unrecognized?

Question

I'm trying to install hadoop, and I need to restart the sshd service in order to configure the connection between the nodes... However, whenever I write: service sshd restart a message error will be displayed telling me that this service is not recognized.

Any help to install this system?

Mucoviscidosis

Seeing the same problem with Trusty Tahr. – Folk

Answer 1

In Ubuntu, install sshd client and server with these commands:

sudo apt-get install openssh-client

and

sudo apt-get install openssh-server

Then, to restart sshd, type:

sudo /etc/init.d/ssh restart

This worked for me, when I had the same problem. You can find more information here.

Hagi

yes, but wait should I reboot the node or restart it? – Mucoviscidosis

Are you running Ubuntu? What happens when you type: which sshd? If nothing is output, it means that sshd is not installed. I don't think that you need to reboot. – Hagi

No, it didn't work :( and when I write "which sshd", I get /usr/sbin/sshd – Mucoviscidosis

Then, it is not an installation problem. Based on your distribution, check this site and this, I am afraid, is my last guess (put sudo in the front): starnet.com/xwin32kb/restart_sshd – Hagi

Now I'm having another problem, if fact I cannot anymore add ssh keys whenever I write ssh-add key.pem it tells me Could not open a connection to your authentication agent. I cannot understand, is it because of these command that you have given to me? – Mucoviscidosis

Answer 2

Try these commands:

For Debian/Ubuntu

/etc/init.d/sshd restart

For RedHat and Fedora Core Linux

/sbin/service sshd restart

Masterpiece

For Debian/Ubuntu try /etc/init.d/ssh restart – Tradesman