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Unable to establish ssh connection to [zhang@biecuole.local:22]: Server u'biecuole.local' not found in known_hosts

This error simply tells you that the host you are trying to connect to (using SSH) is not yet known to your own system (ie: the machine from which you are trying to connect to others).

Logging in once with ssh (in a regular terminal session) should solve this (make sure to first check #q41446 though).

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