Can you copy SSH key to another machine?
If you are logged in to either S1 or H1 (which now have your key) using ssh-copy-id will allow you to transfer your public key (not private) to the H2. In general it is best to limit the number of machines on which your private key is installed. Try to keep it to a few secure machines only to prevent its loss.
Copy the key to a server
The copying may ask for a password or other authentication for the server. Only the public key is copied to the server. The private key should never be copied to another machine.
Using putty, tell it to export your private-key in open-ssh format, then copy this to the new local machine (running openssh). It goes in directory ~/. ssh/ mine is in file id_rsa .
- In a terminal window, enter the following command: ssh-keygen -t rsa.
- Follow the prompts to generate the key. You must provide a file name and a passphrase. A public and a private key are generated. ...
- Copy the public key to each node computer, by using the following command: ssh-copy-id username @ node_name.
It works having the one key, but means if you need to revoke the key (if it is compromised), then you will need to change it on all machines. Of course, if an attacker gets access and is able to ssh into another machine, they can then get the key from that machine, and so on.
The same SSH key should be able to be used from multiple clients. I have different SSH keys for different networks and they're actually stored on an encrypted USB drive that I use from several different computers without a problem.
- Launch terminal.
- Locate your public SSH key. $ ls ~/.ssh/id* /home/user/.ssh/id_rsa /home/user/.ssh/id_rsa.pub. ...
- Make sure your public key is in OpenSSH format. ...
- Add your SSH public key to remote server user's authorized_keys file using ssh-copy-id command.
If you are logged in to either S1 or H1 (which now have your key) using ssh-copy-id will allow you to transfer your public key (not private) to the H2. In general it is best to limit the number of machines on which your private key is installed. Try to keep it to a few secure machines only to prevent its loss.
Public-Key Basics
ssh/id_rsa and the public key is stored in ~/. ssh/id_rsa. pub . The private key should only be kept on your local system and should be encrypted using a passphrase that is at least as strong as any password you would normally use.
Manually Copy the SSH Key with PuTTY
Open the authorized_keys file with the text editor of your choice ( nano , for example). Then, paste the contents of your public key that you copied in step one on a new line at the end of the file. Save, close the file, and exit PuTTY.
How do I paste a public key?
Paste the public key into the file by simply right-clicking the SSH client window. Make sure the key goes on a single line for OpenSSH to be able to read it. Note that the key type needs to also be included, ssh-rsa as shown in the example below.
SSH keys are typically configured in an authorized_keys file in . ssh subdirectory in the user's home directory. Typically a system administrator would first create a key using ssh-keygen and then install it as an authorized key on a server using the ssh-copy-id tool.
The copying of the private key will work, iff the permissions to the ssh files copied are correct, i.e. readable for the user who uses the keys, something like 555 will do. Also, since github allows multiple ssh keys to be used with same account, you can create a new keypair and add it to your account.
Yes you should generate a new ssh key for every workstation. Also make sure to specify a passphrase for your private key and keep it safe. Never share it.
Yes, it's possible for a single user to accept multiple public SSH keys. The text of the key files all have to be copied into /home/deploy/. ssh/authorized_keys (deploy was the user in the above example).
The SSH key pair is used to authenticate the identity of a user or process that wants to access a remote system using the SSH protocol. The public key is used by both the user and the remote server to encrypt messages. On the remote server side, it is saved in a file that contains a list of all authorized public keys.
An SSH key is an access credential for the SSH (secure shell) network protocol. This authenticated and encrypted secure network protocol is used for remote communication between machines on an unsecured open network. SSH is used for remote file transfer, network management, and remote operating system access.
The SSH agent ( ssh-agent ) is an SSH key manager that stores the SSH key in a process memory so that users can log into SSH servers without having to type the key's passphrase every time they authenticate with the server.
- You have two options: either import an existing SSH public key or create a new key pair.
- Option 1: Import SSH-Key. ...
- give the key a name, paste your public key from the clipboard into the Public Key field and click on Import Key Pair. ...
- Choose a name for the key pair.
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3 Answers
- Create the . ssh folder in your Windows account profile folder (typically in C:\Users\username\. ...
- Create authorized_keys file in the folder and add your public key to it.
- Make sure that the ACL of the .
Are SSH keys specific to user?
ssh will default to the current username (the user running ssh) when no username is given.
Private key is used for both encrypting and decrypting the sensitive data. It is shared between the sender and receiver of encrypted data. Public key is used only for the purpose of encrypting the data. The private key mechanism is faster.
- In Finder, search for the Keychain Access app.
- In Keychain Access, search for SSH.
- Double click on the entry for your SSH key to open a new dialog box.
- In the lower-left corner, select Show password.
- You'll be prompted for your administrative password. ...
- Your password will be revealed.
- You have two options: either import an existing SSH public key or create a new key pair.
- Option 1: Import SSH-Key. ...
- give the key a name, paste your public key from the clipboard into the Public Key field and click on Import Key Pair. ...
- Choose a name for the key pair.
...
3 Answers
- Create the . ssh folder in your Windows account profile folder (typically in C:\Users\username\. ...
- Create authorized_keys file in the folder and add your public key to it.
- Make sure that the ACL of the .
...
Method 2 Manually Copy SSH Keys
- Copy . ...
- Now generate new SSH Keys in machine2.
- The next step is to replace the contents of all files of the .
Login to github.com and bring up your account settings by clicking the tools icon. Select SSH Keys from the side menu, then click the Add SSH key button. Name your key something whatever you like, and paste the contents of your clipboard into the Key text box. Finally, hit Add key to save.
- Begin by copying the contents of your public SSH key on your local computer. ...
- Once you have copied that text, use the command ssh to add the key. ...
- Create the ~/.ssh directory and authorized_keys file if they don't already exist: mkdir -p ~/.ssh && touch ~/.ssh/authorized_keys.
- Open .
- Enter ls -al ~/.ssh to see if existing SSH keys are present. $ ls -al ~/.ssh # Lists the files in your .ssh directory, if they exist.
- Check the directory listing to see if you already have a public SSH key. ...
- Either generate a new SSH key or upload an existing key.
SSH keys are typically configured in an authorized_keys file in . ssh subdirectory in the user's home directory. Typically a system administrator would first create a key using ssh-keygen and then install it as an authorized key on a server using the ssh-copy-id tool.
How do I copy a public key from a server?
- Copy the contents of the public key file, usually $HOME/. ssh/id_rsa. ...
- Ensure that the permissions of $HOME/. ssh and $HOME/. ...
- On the remote system, output the ~/.ssh/authorized_keys file: Copy. cat .ssh/authorized_keys.
- Note whether your key entry is included in the output.
The contents of your public key (\. ssh\id_ed25519. pub) needs to be placed on the server into a text file called administrators_authorized_keys in C:\ProgramData\ssh\. You can copy your public key using the OpenSSH scp secure file-transfer utility, or using a PowerShell to write the key to the file.
Just use command sshkey in terminal to copy your public-key to clipboard.
If you choose the default location, your public key will be located in /home/ sammy /. ssh/id_rsa. pub and your private key will be located in /home/ sammy /. ssh/id_rsa .
