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It’s perfectly acceptable to have more than one key in an authorized_keys file.
Where is authorized keys file?
Location of the Authorized Keys File ssh/authorized_keys in the user’s home directory. Many OpenSSH versions also look for ssh/authorized_keys2 . Some organizations use custom OpenSSH builds with different default paths.
To append to the end of authorized_keys I.e log into a remote host and add the public key to that computers authorized_keys file. If the key you are installing is ~/. ssh/id_rsa then you can even drop the -i flag completely.
What is the authorized keys file in SSH?
Authorized_keys file in SSH 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.
What to do when you have multiple SSH keys?
It is helpful for identifying and managing keys within the authorized_keys file on the Client in the event that you have multiple key logins. Replace “server comment field” with a machine name, IP address, date, or task name so that you can easily identify where and why a given key was created.
Where do I find the public keys for SSH?
The public keys in the authorized_keys file should be one line for each key; make sure a key doesn’t contain linefeeds anywhere. The IP address in the from= entry must be the correct IP address for the originating host, as seen by the destination host.
It involves more steps but is the easiest to complete without error. Those proficient with terminal commands will do it all in one step from the Host). Alternatively, you can open the id_rsa.pub file via a text editor like iv and copy the key text – then open the authorized_keys file on the Client and paste the text directly into the file.