When accessing a remote system, various advanced features can make interaction more productive. Also, sometimes users need more background to understand encountered issues.

• To utilize productivity features of remote access.
• To debug basic issues of remote access.

• Describing the meaning of the files in the $HOME/.ssh directory
  1. authorizedkeys - config - id*, *.pub
  2. known_hosts
• Forwarding a remote port to a local port to access remote services
• Creating a SSH configuration file
  1. Username, system name
  2. Utilizing automatically an intermediate proxy system via ProxyJump
  3. Keep-alive configuration
• Utilizing advanced features of screen and tmux
  1. providing multiple virtual terminals
  2. switching between virtual terminals
• Utilizing the -v option for SSH to receive debugging output