Just because I always forget:
Step 1: Create public and private keys using ssh-keygen
[user@Host ~]$ ssh-keygen Generating public/private rsa key pair. Enter file in which to save the key (/home/user/.ssh/id_rsa): Created directory '/home/user/.ssh'. Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /home/user/.ssh/id_rsa. Your public key has been saved in /home/user/.ssh/id_rsa.pub. The key fingerprint is: 0d:d2:94:07:93:a9:48:b9:33:73:fb:f1:6e:33:ce:d7 user@Host The key's randomart image is: +--[ RSA 2048]----+ | . += | | o o+.. | | . o..o. | | * o. o | | = .S . | | . . | | . o . | | ..= . E | | +++ | +-----------------+
Step 2: Copy the public key to remote-host using ssh-copy-id
Now here comes the awesome part: You don’t have to scp the public key to your remote host and cat it into
~/.ssh/authorized_keys. Instead, you can use ssh-copy-id
[user@Host ~]$ ssh-copy-id -i .ssh/id_rsa.pub user@remote-host user@remote-host's password: Now try logging into the machine, with "ssh 'user@remote-host'", and check in: .ssh/authorized_keys to make sure we haven't added extra keys that you weren't expecting.
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Thanks for documenting this – I always forget too!
Do you have any suggestions for how I can copy my public key to a remote server where password authentication has been disabled (PasswordAuthentication no)?