不能部署migrate通过Tunffle编译的以太坊智能合约。我是这么做的：

truffle init
truffle compile
open other terminal and run testrpc
truffle migrate

前三步都正常过了，当我运行truffle migrate时，出现了这个问题：

Error: No network specified. Cannot determine current network.
    at Object.detect (/usr/local/lib/node_modules/truffle/build/cli.bundled.js:43157:23)
    at /usr/local/lib/node_modules/truffle/build/cli.bundled.js:200497:19
    at finished (/usr/local/lib/node_modules/truffle/build/cli.bundled.js:43085:9)
    at /usr/local/lib/node_modules/truffle/build/cli.bundled.js:198408:14
    at /usr/local/lib/node_modules/truffle/build/cli.bundled.js:68162:7
    at /usr/local/lib/node_modules/truffle/build/cli.bundled.js:163793:9
    at /usr/local/lib/node_modules/truffle/build/cli.bundled.js:160353:16
    at replenish (/usr/local/lib/node_modules/truffle/build/cli.bundled.js:160873:25)
    at iterateeCallback (/usr/local/lib/node_modules/truffle/build/cli.bundled.js:160863:17)
    at /usr/local/lib/node_modules/truffle/build/cli.bundled.js:160838:16

开发环境：

• node 9.1.0
• truffle 4.0.1
• testrpc 6.0.3

解决办法：

应该在配置文件truffel.js中设置下networks网络，它位于项目文件夹的根目录中。

module.exports = {
  networks: {
    development: {
      host: "localhost",
      port: 8545,
      network_id: "*" // 所有id都匹配
    }
  }
};