c-lightning - Unknown Peer
Everything but the last Comand looks correct. There is no command channel in c-lightning. In order to open a channel you need to execute

cli/lightning-cli fundchannel id satoshi [feerate] [announce] [minconf]
  Fund channel with {id} using {satoshi} (or 'all') satoshis, at optional {feerate}. Only use outputs that have {minconf} confirmations.


The thing that beginners sometimes oversee is that before opening a channel with a node you need to peer with it first via the connect command like you did.