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By default the file is located at ~/. ssh/authorized_keys .
What are SSH Authorized_keys?
The authorized_keys file in SSH specifies the SSH keys that can be used for logging into the user account for which the file is configured. It is a highly important configuration file, as it configures permanent access using SSH keys and needs proper management.
How do I set .ssh permissions?
ssh directory permissions should be 700 (drwx——). The public key (. pub file) should be 644 (-rw-r–r–). The private key (id_rsa) on the client host, and the authorized_keys file on the server, should be 600 (-rw——-).
What is the difference between authorized_keys and authorized_keys2?
The $HOME/. ssh/authorized_keys file lists the RSA keys that are permitted for RSA authentication in SSH protocols 1.3 and 1.5 Similarly, the $HOME/. ssh/authorized_keys2 file lists the DSA and RSA keys that are permitted for public key authentication (PubkeyAuthentication) in SSH protocol 2.0.
The following tokens are defined: %% is replaced by a literal ‘%’, %h is replaced by the home directory of the user being authenticated, and %u is replaced by the username of that user. After expansion, AuthorizedKeysFile is taken to be an absolute path or one relative to the user’s home directory.
The cat ~/.ssh/authorized_keys command shows you the authorized_keys file of the currently logged in user. When logged in as root, or using sudo, this will give you the authorized_keys file of the root user. The authorized_keys file, at least on Ubuntu, is usually owned by the user. So the currently logged in user (root or not) can see it.
Where do I store my public key in SSH?
When the key pair has been generated, the client will need to send you the corresponding public key. The public key should be stored in the authorized_keys file within the user’s .SSH folder. Use FTP in binary mode to move the public key into the user’s .SSH directory. 7. Rename the public key’s filename to authorized_keys. a.
How to add a public key to SSHD?
Most documentation suggest to add a public key to $HOME/.ssh/authorized_keys and then to restart the sshd service ( systemctl restart sshd ). The OS of interest is Linux. Is the restart of sshd needed? If sshd is restarted, is there a service outage at that time?