ssh

mikeli@mikeli-DELL:~/$ ls -al ~/.ssh
total 20
drwx------  2 mikeli mikeli 4096 Aug 29 06:07 .
drwxr-x--- 33 mikeli mikeli 4096 Jan 12 08:08 ..
-rw-------  1 mikeli mikeli    0 Feb 22  2025 authorized_keys
-rw-------  1 mikeli mikeli  399 Aug 29 06:00 id_ed25519
-rw-r--r--  1 mikeli mikeli   95 Aug 29 06:00 id_ed25519.pub
-rw-r--r--  1 mikeli mikeli  142 Aug 29 06:07 known_hosts

https://docs.github.com/en/authentication/connecting-to-github-with-ssh/about-ssh