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In this post I will be demonstrating how to generate an RSA private and public key pair for SSH authentication to a Linux server. Using key based authentication enhances security when accessing devices directly over the Internet via SSH because now instead of just needing to know a user name and password combination you need to have the private key in your possession so no matter how many times someone guesses a password if they do not have that private key they will not gain access unless there is an underlying flaw in the SSH protocol or some other piece of software your server is running that is not patched.
Bash echo ssh-rsa a-bunch-of-characters-are-displayed-here-and-is-very-long username@ubuntu01 /.ssh/authorizedkeys exit Loading SSH key. The next step is to load the public key to the configuration. The command covered here instructs the router to load the public key from the Linux environment to EdgeOS. This ensures that the keys will survive a reboot and/or firmware upgrade since configurations.
Generate the Keys
First you will need to navigate to your users home directory and create a new directory .ssh and navigate into the newly created ‘.ssh’ directory.
- The keys have now been generated and are stored in the.ssh folder associated with the user account on the Host machine. The final steps are to copy the public key to the Client and append it to the authorizationkeys file.
- May 02, 2019 Add custom SSH keys to the Ubiquiti UniFi Controller - README.md.
- Add custom SSH keys to the Ubiquiti UniFi Controller - README.md. Skip to content. All gists Back to GitHub. Sign in Sign up Instantly share code, notes, and snippets.
- Dreamweaver does not like the the SSH Key format generated by the latest version of OpenSSH and the ssh-keygen untility. If you are running a recent version of macOS, including Mojave. You will need to 'downgrade' your idrsa file using the folloing command in the Terminal app: ssh-keygen -p -m PEM -f /.ssh/idrsa. Now continue to set up.
Generating public/privatersa key pair.
Enter file inwhich tosave the key(/home/user/.ssh/id_rsa):<HIT ENTER HERE>
Enter passphrase(empty forno passphrase):<ENTERAPASS PHRASE HERE>
Enter same passphrase again:<RE ENTER YOUR PASS PHRASE HERE>
Your identification has been saved in/home/user/.ssh/id_rsa.
Your publickey has been saved in/home/user/.ssh/id_rsa.pub.
One thing to note on the 4th and 5th line it prompts you to enter a pass phrase for the key. You will most likely want to enter a pass phrase here because if you don’t all an attacker needs is the key to be able to login to the system.
If you want to be able to login without having to use a password at all you can just hit enter and it will be left blank but be aware that not attaching a pass phrase to your key is considerably more weak.
At this point if we list the files in our directory we will have a file ‘id_rsa’ and ‘id_rsa.pub’ the file with ‘.pub’ is the public key that the server will present when a client tries to authenticate and will stay on the server and the file without ‘.pub’ is the private key you will need to copy down to your client computer.
Rename Public Key
Depending on how you configure your SSH server you will need to rename your public key to match the name that the server will be looking for when presenting the public key to clients that are authenticating. Often times the default key file name is ‘authorized_keys’, so on the server issue the following command to rename ‘id_rsa.pub’ to ‘authorized_keys’.