Authorized keys

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touch ~/.ssh/authorized_keys && chmod og-r ~/.ssh/authorized_keys

chmod 600 ~/.ssh/authorized_keys or chmod ogw-r ~/.ssh/authorized_keys
chown 

sshd_config

#AuthorizedKeysFile	.ssh/authorized_keys .ssh/authorized_keys

https://linux.die.net/man/5/sshd_config sshd_config

AUTHORIZED_KEYS FILE FORMAT
    AuthorizedKeysFile specifies the files containing public keys for public key authentication; if this option is not specified, the default is ~/.ssh/authorized_keys and
    ~/.ssh/authorized_keys2.  Each line of the file contains one key (empty lines and lines starting with a ‘#’ are ignored as comments).  Public keys consist of the following
    space-separated fields: options, keytype, base64-encoded key, comment.  The options field is optional.  The supported key 
types are:
          sk-ecdsa-sha2-nistp256@openssh.com
          ecdsa-sha2-nistp256
          ecdsa-sha2-nistp384
          ecdsa-sha2-nistp521
          sk-ssh-ed25519@openssh.com
          ssh-ed25519
          ssh-dss
          ssh-rsa
    The comment field is not used for anything (but may be convenient for the user to identify the key).

Example files[edit]

ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIEBiBqpWXhPTH9RIo9UR3ED9xUv6O/SqpWRn16UH/gHD TEXT@TEXT
ssh-rsa .../...


Additional information about format key:

https://serverfault.com/questions/526399/why-do-my-two-ssh-public-keys-have-the-same-beginning/526404
https://tools.ietf.org/html/rfc4253
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQ...
      |  "ssh-rsa"   |exponent|   modulus
ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIFKy...
          |   "ssh-ed25519"   |   32 byte public key


Related terms[edit]

See also[edit]