Find Ssh

I want to use SSH to access a remote machine. However, I do not know how to find the HostName of a machine. I tried using the hostname command, but that only gives the local address of the machine. Ssh folder is probably in your home directory C:Users. If you need to install it then click 'Add a feature', locate OpenSSH Client, click it and click install to install it. Click to see full answer Similarly, you may ask, where can I find.SSH folder in Ubuntu?

If you are even a tad bit familiar with SSH, you know that you can use it to connect to remote Linux systems.

Using SSH to connect to remote system is simple. All you need to do is to use a command like this:

This connects to the default SSH port 22. You may specify the port as well if you want.

Now this is all plain and simple if you just have one server. Even if you don’t remember the server’s IP address, you can perform a reverse search to the history using the famous terminal keyboard shortcut Ctrl+R and find the SSH command you used in the past.

Ssh-agent.exe stores private keys used for public key authentication; ssh-add.exe adds private keys to the list allowed by the server; ssh-keyscan.exe aids in collecting the public SSH host keys from a number of hosts; sftp.exe is the service that provides the Secure File Transfer Protocol, and runs over SSH; scp.exe is a file copy utility that.
Find the SSH section, and click enable. From now on your SSH will be permanently enabled. Note: You'll see no change when clicking on the button, but it will be ok. Second method: file (more advanced) Mount your SD card on your computer. Create or copy a file called ssh in /boot.
AbsoluteTelnet / SSH is a telnet and SSH client for Windows. A secure flexible SSH client with SFTP file transfer and rock-solid emulations that is suitable for developers, administrators, or deployment across the enterprise.

But things get complicated when you have several servers to manage. I have around ten servers that I connect to from time to time. Some are production servers and some are test servers.

Now keeping a track of these servers is not easy. Even if I can find the SSH commands from the history, it is difficult to guess which IP belongs to which server.

Of course, I can open my dashboards on Linode, UpCloud, DigitalOcean and Google Cloud to get the IP or keep a list on my local system.

A better and easier way is to use SSH config file.

Using SSH config file for easily connecting to remote servers

The SSH config file allows you to create different profiles for different host configurations. There is no limit to such profiles and you may add as many as possible.

So, if you connect to multiple remote systems via SSH, creating SSH profiles will be a good move to save your time.

Let me show you how to use it.

Step 1: Create the SSH config file

When you install SSH, you’ll have a ~/.ssh directory created automatically. This direct contains your public key, private key a known_hosts file. Your config is also stored here.

At least on Ubuntu, the SSH config file is not created by default. You can easily create this file using the touch command like this:

Step 2: Add an SSH profile in the config file

Now that you have the SSH config file, you can edit it using Vim or Nano. Let me show you an example of the syntax which you should follow.

Let’s say you connect to a server with IP 275.128.172.46. Your username is Alice and the server is used for hosting your website. To harden SSH security, you use port 1500 instead of the default SSH port 22.

You can add all this information in the following manner in your ~/.ssh/config file:

Just save the information in the file. No need to restart any service.

Now, instead of writing a long command like this:

You can just use this command (tab completion works as well):

When you run the above command, ssh looks for a Host named website in the ~/.ssh/config. If it finds a host with that name, it gets all the information related and used it for making an SSH connection.

You might wonder about a few things, so I’ll mention it here:

There is no space or tab indention restriction while entering the host information. Space or tab indention are used for making the config file easily understandable.
The Hostname can be the IP address of the server or a hostname that can be resolved on your network.
All the parameters like hostname, user and port are optional. However, I personally advise keeping at least hostname because that’s what you need (and you forget) most of the time.
If your SSH config file is wrongly configured, it will result in an error when you try to use it for SSH connection.
You cannot save passwords in SSH config. I advise adding your public SSH key to the server for easy access.

Step 3: Adding multiple profiles in SSH config file

The previous step gave you an idea about how to add an SSH profile. Let’s take it to the next step by adding multiple profiles in it.

Here’s what the SSH config file looks like now:

This time, I have added four different SSH profiles in it.

Did you notice the Host * entry at the end of the file? You can use this entry to for adding a parameter common to all profiles if that parameter hasn’t been mentioned for the profile explicitly.

So if I try to use the main-server SSH profile, it will automatically take root user.

ssh main-server = ssh root@275.128.172.49

Order of the SSH configuration

The ssh configuration follows the following order:

command-line options
user’s configuration file (~/.ssh/config)
system-wide configuration file (/etc/ssh/ssh_config)

This means that the priority is given to the command you enter and then it looks into ~/.ssh/config and then in /etc/ssh/ssh_config.

So, if you want to override a profile, you can do that using the -o option of the ssh command.

For example, if I use this command:

It will take user bob instead of the user alice as defined in the ~/.ssh/config (in the previous step).

There’s a lot more to SSH config

To be honest, there is so much more to SSH config file that cannot be covered in a single article. You can use name/IP matching, subnets and what not.

The scope of this article was to introduce you to SSH config and help you create SSH profiles for easily connecting to various remote Linux systems.

You can always refer to the man page of ssh_config to know more about the parameters you can use while creating your SSH config file.

I hope this SSH tip was helpful to you. If you already use SSH config file and have a some nifty tip with you, do share it with the rest of us in the comment section.

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Enable the SSH server in Windows

You need to add the optional feature ‘OpenSSH Server’ in Windows 10 first by going to Settings -> search for Add an optional feature -> search again for OpenSSH Client and choose to install.

Configure SSH service to automatically start

By default Windows won’t start the ssh-agent. You can tell Windows to start the service automatically in the future by running the following command in PowerShell (as Administrator).

But right now, manually start the service by running

Generate the key

Open PowerShell and follow these commands to generate SSH key on your machine.

Keep the default location for where to save the key. This should be C:Users<username>/.ssh/id_rsa.

Generate a complex password and store in safe place, ideally a password manager.Enter this password when prompted. When complete you’ll be shown the key fingerprint and the key's randomart image.

Add key to the SSH Agent

We need to add the key to our ssh-agent so we don’t have to type the key each time we use it.

The agent will recognise that a new key is present and will ask for the passphrase.

Once entered you’ll see the confirmation message Identity added.

I still needed to manually add the key to the ssh-agent. To do so navigate to the .ssh folder where we stored our keys earlier C:Users<username>/.ssh/ and run the following with the correct key name.

This will prompt you to enter the passphrase in and once again you should see the Identity added confirmation.

Access your public key

Now we have our key we can add it to systems such as GitHub or Bitbucket. To do so follow the instructions for that particular service. We’ll need to retrieve the public key from our machine to do so.

Ssh Secure Shell Download

Navigate to the .ssh folder and find the file <private-key>.pub. Open this in a text editor. The contents of this file is what you need to copy and paste into the relevant service you’re wanted to add the key to.

Testing the keys

In this example lets assume we’ve added our key to Bitbucket. We can test that the key is correctly set up by running the following command.

If all is well then we should see the logged in as message without needing to enter the passphrase

Using with Git

By now we have our key correctly stored in the SSH agent and we’re allowed to connect to the Bitbucket servers using SSH. However we might still be prompted to enter our passphrase whenever we try to perform a git command that talks to the remote.

The ssh -T command uses the Windows 10 agent so all appears to be correct, but it won’t behave the same in Git. This is due to the fact Git is using it’s own ssh agent, not the Windows 10 agent that we’ve added our keys to.

We need to tell Git to use the Windows SSH agent instead of it’s own. We do this by updating the git config.

Find Ssh Port Centos

Now when we use Git, we won’t be prompted for our passphrase, even after a restart.