====== SSH ======
<code>ssh [USER@]HOST[:PORT]</code>

===== Create public key =====
<code>ssh-keygen</code>
<code>ssh-keygen -t rsa -b 4096</code>
<code>ssh-keygen -t ed25519</code>

===== Config file =====
<file bash .ssh/config>
Host HOSTNAME
  Hostname HOSTNAME
  User root
  Port 22
  PreferredAuthentications publickey
  IdentityFile ~/.ssh/id_rsa
</file>