Keep remote session using screen

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$ ssh remote
$ screen
  ... do stuff ...
  get disconnected

$ ssh remote
$ screen -dr
  ... back where you were ...

• screen - to start a new session.
• screen -dr - to attach to an existing session.
• Ctrl-a Ctrl-d - to detach from an existing session.

• Ctrl-a Ctrl-c Create new Window
• Ctrl-a w List Windows
• Ctrl-a 0 Jump to Window 0
• Ctrl-a ? Help
• Ctrl-d Close current window (close screen)