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How do I use SSH to connect to a remote Linux server? In view of this problem, this article introduces the corresponding analysis and answers in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible way.

What is SSH?

SSH (Secure Shell) is a protocol used to log in to a remote system. It provides greater security for connections. SSH is the most popular protocol for connecting remote Linux and Unix servers.

To establish a connection to a remote server, the SSH server must be running on the remote server and there must be some SSH clients on the system. The default SSH runs on port 22.

How to use ssh?

For example, a remote Linux server (remote.example.com) is running a ssh server and opening access to the network. Now run the following command from the Linux desktop terminal. After successful authentication, you will get the remote server shell program.

$ssh remote.example.com

Windows client users can use the following ssh clients.

Using the SSH command, you can also specify a remote user name. This logs in to the remote server with the specified users and their permissions.

$ssh username@remote.example.com

If the ssh server runs on a non-standard port. You can also specify it using the-p option between ssh and the remote server. For example, a remote ssh server is listening on port 2222.

$ssh-p 2222 username@remote.example.com

If your remote server provides a SSH key. For example, there is a mykey.pem file. You can use the ssh command to specify the ssh key with the-I option. Ensure that only the current user can access the key file. Just like you can set 400 or 600 permissions.

$ssh-I mykey.pem username@remote.example.com

Key-based ssh allows you to log in to a remote system without a password using ssh. You can simply type ssh remote.example.com to get the remote server shell. This is very helpful for automating tasks using ssh. You can also be useful for frequently logging on to the server.

With key-based ssh, you can provide enabled security on the ssh server. You only need to disable password-based login. For now, the remote server will only allow key-based access.

Read: how to set up key-based SSH

It may be that you have many remote servers and it is difficult to manage SSH hosts and keys. The following tutorials will help you manage these keys.

Read: how to manage SSH hosts and private keys

What is key-based ssh?

Key-based ssh allows you to log in to a remote system using ssh without requiring a password. Just type ssh remote.example.com to get the remote server shell. This helps to automate tasks using ssh. It can also be helpful for frequently logged-in servers.

This is the answer to the question about how to use SSH to connect to the remote Linux server. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel for more related knowledge.

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