Linux from the command line | Linux Tips & Tricks -- setting up passwordless ssh logins
Being that ssh is the primary method of communicating between systems, eventually you can get tired of typing your password every time. For convenience and security reasons you can configure ssh to handle the security for you.
Personally I wouldn't recommend that a home network user disable password logins because you can leave yourself stuck locked out of your systems remotely.
In fact for sysadmins I recommend being careful with disabling password logins as well. Take time to think about it and map out your network security zones etc and disable the externally reachable systems first, then work your way in if you think you need more security.
https://www.maketecheasier.com/enable-passwordless-ssh-logins-linux/
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