On the SSH tab set the preferred SSH protocol version to 2 and from Auth set the full path to the.PPK private key file you converted earlier. Go back to the Sessions tab and hit the Save button. You will now see SvnConnection in the list of saved sessions. Click on Open and you should see a telnet style login prompt. Install the plugin and restart CLion. Before working with a remote MOTORCORTEX host, make sure that the host is connected and reachable. Use ssh-copy-id to provide a temporary access without a password tothe remote MOTORCORTEX host. Ssh-copy-id If there is an error: No identities found, run the following command.

Clion Ssh Key Ubuntu

Introduction

SSH, or secure shell, is an encrypted protocol used to administer and communicate with servers. When working with a CentOS server, chances are, you will spend most of your time in a terminal session connected to your server through SSH.

In this guide, we’ll focus on setting up SSH keys for a vanilla CentOS 7 installation. SSH keys provide a straightforward, secure way of logging into your server and are recommended for all users.

Step 1 — Create the RSA Key Pair

The first step is to create a key pair on the client machine (usually your computer):

By default, ssh-keygen will create a 2048-bit RSA key pair, which is secure enough for most use cases (you may optionally pass in the -b 4096 flag to create a larger 4096-bit key).

After entering the command, you should see the following prompt:

Press ENTER to save the key pair into the .ssh/ subdirectory in your home directory, or specify an alternate path.

If you had previously generated an SSH key pair, you may see the following prompt:

If you choose to overwrite the key on disk, you will not be able to authenticate using the previous key anymore. Be very careful when selecting yes, as this is a destructive process that cannot be reversed.

You should then see the following prompt:

Here you optionally may enter a secure passphrase, which is highly recommended. A passphrase adds an additional layer of security to prevent unauthorized users from logging in. To learn more about security, consult our tutorial on How To Configure SSH Key-Based Authentication on a Linux Server.

You should then see the following output:

You now have a public and private key that you can use to authenticate. The next step is to place the public key on your server so that you can use SSH-key-based authentication to log in.

Step 2 — Copy the Public Key to CentOS Server

The quickest way to copy your public key to the CentOS host is to use a utility called ssh-copy-id. Due to its simplicity, this method is highly recommended if available. If you do not have ssh-copy-id available to you on your client machine, you may use one of the two alternate methods provided in this section (copying via password-based SSH, or manually copying the key).

Copying your Public Key Using ssh-copy-id

The ssh-copy-id tool is included by default in many operating systems, so you may have it available on your local system. For this method to work, you must already have password-based SSH access to your server.

To use the utility, you need only specify the remote host that you would like to connect to and the user account that you have password SSH access to. This is the account to which your public SSH key will be copied.

The syntax is:

You may see the following message:

This just means that your local computer does not recognize the remote host. This will happen the first time you connect to a new host. Type “yes” and press ENTER to continue.

Clion Ssh Key Linux

Next, the utility will scan your local account for the id_rsa.pub key that we created earlier. When it finds the key, it will prompt you for the password of the remote user’s account:

Type in the password (your typing will not be displayed for security purposes) and press ENTER. The utility will connect to the account on the remote host using the password you provided. It will then copy the contents of your ~/.ssh/id_rsa.pub key into a file in the remote account’s home ~/.ssh directory called authorized_keys.

You should see the following output:

At this point, your id_rsa.pub key has been uploaded to the remote account. You can continue on to Step 3.

Copying Public Key Using SSH

If you do not have ssh-copy-id available, but you have password-based SSH access to an account on your server, you can upload your keys using a conventional SSH method.

We can do this by using the cat command to read the contents of the public SSH key on our local computer and piping that through an SSH connection to the remote server.

On the other side, we can make sure that the ~/.ssh directory exists and has the correct permissions under the account we’re using.

We can then output the content we piped over into a file called authorized_keys within this directory. We’ll use the >> redirect symbol to append the content instead of overwriting it. This will let us add keys without destroying previously added keys.

The full command looks like this:

You may see the following message:

This means that your local computer does not recognize the remote host. This will happen the first time you connect to a new host. Type “yes” and press ENTER to continue.

Afterwards, you should be prompted to enter the remote user account password:

After entering your password, the content of your id_rsa.pub key will be copied to the end of the authorized_keys file of the remote user’s account. Continue on to Step 3 if this was successful.

Copying Public Key Manually

If you do not have password-based SSH access to your server available, you will have to complete the above process manually.

We will manually append the content of your id_rsa.pub file to the ~/.ssh/authorized_keys file on your remote machine.

To display the content of your id_rsa.pub key, type this into your local computer:

You will see the key’s content, which should look something like this:

Access your remote host using whichever method you have available.

Once you have access to your account on the remote server, you should make sure the ~/.ssh directory exists. This command will create the directory if necessary, or do nothing if it already exists:

Now, you can create or modify the authorized_keys file within this directory. You can add the contents of your id_rsa.pub file to the end of the authorized_keys file, creating it if necessary, using this command:

In the above command, substitute the public_key_string with the output from the cat ~/.ssh/id_rsa.pub command that you executed on your local system. It should start with ssh-rsa AAAA....

Finally, we’ll ensure that the ~/.ssh directory and authorized_keys file have the appropriate permissions set:

This recursively removes all “group” and “other” permissions for the ~/.ssh/ directory.

If you’re using the root account to set up keys for a user account, it’s also important that the ~/.ssh directory belongs to the user and not to root:

In this tutorial our user is named sammy but you should substitute the appropriate username into the above command.

We can now attempt passwordless authentication with our Ubuntu server.

Step 3 — Authenticate to your CentOS Server Using SSH Keys

If you have successfully completed one of the procedures above, you should be able to log into the remote host without the remote account’s password.

The basic process is the same:

If this is your first time connecting to this host (if you used the last method above), you may see something like this:

This means that your local computer does not recognize the remote host. Type “yes” and then press ENTER to continue.

If you did not supply a passphrase for your private key, you will be logged in immediately. If you supplied a passphrase for the private key when you created it, you will be prompted to enter the passphrase now. After authenticating, a new shell session should open for you with the configured account on the CentOS server.

If key-based authentication was successful, continue on to learn how to further secure your system by disabling password authentication.

Step 4 — Disable Password Authentication on your Server

If you were able to login to your account using SSH without a password, you have successfully configured SSH-key-based authentication to your account. However, your password-based authentication mechanism is still active, meaning that your server is still exposed to brute-force attacks.

Before completing the steps in this section, make sure that you either have SSH-key-based authentication configured for the root account on this server, or preferably, that you have SSH-key-based authentication configured for a non-root account on this server with sudo privileges. This step will lock down password-based logins, so ensuring that you will still be able to get administrative access is crucial.

Once you’ve confirmed that your remote account has administrative privileges, log into your remote server with SSH keys, either as root or with an account with sudo privileges. Then, open up the SSH daemon’s configuration file:

Inside the file, search for a directive called PasswordAuthentication. This may be commented out. Press i to insert text, and then uncomment the line and set the value to “no”. This will disable your ability to log in via SSH using account passwords:

When you are finished making changes, press ESC and then :wq to write the changes to the file and quit. To actually implement these changes, we need to restart the sshd service:

As a precaution, open up a new terminal window and test that the SSH service is functioning correctly before closing this session:

Once you have verified your SSH service, you can safely close all current server sessions.

The SSH daemon on your CentOS server now only responds to SSH keys. Password-based authentication has successfully been disabled.

Conclusion

You should now have SSH-key-based authentication configured on your server, allowing you to sign in without providing an account password.

If you’d like to learn more about working with SSH, take a look at our SSH Essentials Guide.

Remotely editing your work when your server does not have public IP address and you don’t want to spend any money is not so easy. Maybe you can use Team viewer or Anydesk or even chrome remote desktop, but there are high latencies. Maybe you can use ngrok to remotely ssh to your server, you have to use vim and you are not familiar with it at all 😧. I tried to use rmate but it is not convinient to edit across different files in a folder.

I recently found an hot github repository called code-server which is able to run VS Code on a remote server, accessible through the browser. So it suddenly came to my mind that I can remotely edit any code for free as long as I have a linux/macOS environment.

Let’s consider you understand the basic knowledge of SSH key as you are going to use it. For tutorial about how to generate SSH keys, please refer to How to set up SSH keys and connecting to GitHub with SSH.

Firstly you need to see whether your server has a public IP address. If yes (I know this is not common), then things are really easy and you can just follow step 1, 2 and 3; otherwise, directly go to step 0, then step 2 and 3.

Step 1. SSH connect

The -L 8843:localhost:8843 here is local port forwarding which allows you to access local network resources that aren’t exposed to the Internet. The first 8843 is local port, localhost:8843 is the remote code-server default port.

To see whether you can successfully links to the server. The prerequisites are 1) you installed openssh-client 2) you have generated SSH key. If not successfully, maybe you don’t have a public IP address. Then go to step 0.

Step 2. Download code-server

Open this page on your client browser, find the latest release of code-server. Find the binary file for linux and get the downloading address.

Then in the terminal window ssh connected to the remote server, type:

Then your code-server will be installed!

Step 3. Running code-server

Go to the folder of your code waiting to be edited and type code-server in the terminal window ssh connected to remote server.Then open your browser and type localhost:8843, your workspace of VSCode will be revealed to you! The speed is satisfactory to me.

Step 0. Ngrok

Some people will use VPS servers or cloud hosting providers like Vultr, AWS and so on to pay for a public IP address. But here we just need Ngrok, a great tool that can create a tunnel from the public Internet to a port on your local machine. You can give this URL to anyone and any place without the need to pay any money!

Clion Git Ssh Key

Download ngrok onto your remote server and throw the binary file into /usr/local/bin/. Maybe need to sudo chmod a+x ngrok.Then type:

where –region refers to your region. There are four region options: us(Ohio), eu(Frankfurt), ap(Singapore), au(Sydney). If you don’t select a region, the default one is us, which might be slow if you are in Asia.

Then your screen will show something like this:

There is a number after 0.tcp.ngrok.io:15707. You need to remember this port number. Please keep this window on if you want to keep this tunnel open.

Clion Ssh Key Centos

Then you can ssh to your remote server by copying the command: