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#AuthorizedKeysFile .ssh/authorized_keys .ssh/authorized_keys
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:
firstname.lastname@example.org ecdsa-sha2-nistp256 ecdsa-sha2-nistp384 ecdsa-sha2-nistp521 email@example.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).
ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIEBiBqpWXhPTH9RIo9UR3ED9xUv6O/SqpWRn16UH/gHD TEXT@TEXT ssh-rsa .../...
Additional information about format key:
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQ... | "ssh-rsa" |exponent| modulus
ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIFKy... | "ssh-ed25519" | 32 byte public key