Playing with screen

To create a new session:

$ screen

To retrieve a session (when there is only one running):

$ screen -r -d

To retrieve the list of existing sessions:

$ screen -ls

To retrieve a session (when many are running):

$ screen -r -d <name of the session>

To clear dead sessions:

$ screen -wipe

To detach a session:

<CTRL-A> D

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