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# NB: you can only do one command on a channel so we get the channel
##  do the command give back the output then close the channel   Note 
+that the command
##  must be a fully "shell punctuated and escaped" 
...
    }
    return $out ;
}

print docmd("cd tmp; ls") ;
print docmd("cd bin; ls") ;
$ssh2->disconnect() ;