Create the cryptographic Key on FreeBSD / Linux / UNIX workstation, enter:
ssh-keygen -t rsa
Assign the pass phrase (press [enter] key twice if you don’t want a passphrase). It will create 2 files in ~/.ssh directory as follows:
- ~/.ssh/id_rsa : identification (private) key
- ~/.ssh/id_rsa.pub : public key
scp .ssh/id_rsa.pub email@example.com:.ssh/authorized_keys2
At freebsd workstation type:
Deleting the keys hold by ssh-agent
To delete all keys, enter:
To delete specific key, enter:
ssh-add -d key
To generate a public and private key run this command on your backup server:
sudo ssh-keygen -t rsa
We do not want a passphrase for this key because we want these computers to be able to connect to each other without our intervention. Press “ENTER” through all of the prompts to accept the defaults.
user@backupserver:~#: sudo ssh-keygen –t rsa Generating public/private rsa key pair. Enter file in which to save the key (/root/.ssh/id_rsa): Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /root/.ssh/id_rsa. Your public key has been saved in /root/.ssh/id_rsa.pub. The key fingerprint is: … The key's randomart image is: …
We now have a public and private key pair that will allow us to sign in to other servers from our backup server. We need to transfer our public key to the machine we will be backing up so that it knows that we are allowed to access it.
sudo ssh-copy-id -i /root/.ssh/id_rsa.pub firstname.lastname@example.org
Be sure to change “example.com” to the IP address or domain name of the server you will back up.
Once that command executes, you should check that you are able to log-in to your server from your backup server without a password.
sudo ssh email@example.com
Once you’ve verified that you can connect correctly, exit out so that you are able to work on your backup server again.