ssh conifg without pw

1. ssh-keygen -t ed25519
2. Enter
3. Find pub in Win (C:\Users\username.ssh) or Linux (~/.ssh/)
4. cat ~.ssh\id_ed25519.pub and copy all
5. Go to server: echo ‘ssh-ed25519 xxxx xxxx’ » ~/.ssh/authorized_keys
6. (if need) chmod 700 ~/.ssh
   chmod 600 ~/.ssh/authorized_keys

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