update echo private key

host/host.sh

@@ -214,7 +214,7 @@ do
   echo "grpc-port: 38010" >> $configFile
   echo "p2p-host-ip: \"$myIpAddr\"" >> $configFile
   private_key=$(openssl rand -hex 32)
-  echo $private_key > $configPath/private-key
+  echo -n $private_key > $configPath/private-key
   echo "p2p-priv-key: \"/root/private-key\"" >> $configFile
   echo "generate net $i private key $private_key"
   if [ $i -ne 1 ]; then