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This article mainly introduces "installation and configuration of SSH under Ubuntu". In daily operation, I believe many people have doubts about the installation and configuration of SSH under Ubuntu. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts about "installation and configuration of SSH under Ubuntu". Next, please follow the editor to study!

1: a brief introduction to SSH (secure Shell Protocol):

SSH is the abbreviation of Secure Shell, and SSH is a security protocol based on application layer and transport layer. SSH is currently a reliable protocol designed to provide security for remote login sessions and other network services. The use of SSH protocol can effectively prevent information leakage in the process of remote management. SSH was originally a program on the UNIX system, and then rapidly expanded to other operating platforms. When used correctly, SSH can make up for loopholes in the network.

Second: installation and configuration of SSH under Ubuntu

1. First, check whether the SSH client is installed: which ssh

Hadoop@master:~$ which ssh

/ usr/bin/ssh

two。 Check whether the sshd server is installed: which sshd

Hadoop@master:~$ which sshd

Hadoop@master:~$

If there is no output, it is not installed, and SSH will be installed next:

3. Install ssh server side: sudo apt-get install openssh-server

4. View ssh server process: ps-e | grep-I ssh

5. To allow master node to log in to other hosts without a password, you need to configure the public key of the hadoop user.

Generate the public key: ssh-keygen-t rsa-N ""

6. Configure the hadoop user's public key: catid_rsa.pub > > authorized_keys

7. There is no public key information for hadoop users added on all nodes.

At this point, the study on "the installation and configuration of SSH under Ubuntu" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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