CentOS 6.7 make test 出错，commander 模块没安装上，但make install 只有警告。
module.js:327 throw err; ^
Error: Cannot find module 'commander’ at Function.Module._resolveFilename (module.js:325:15) at Function.Module._load (module.js:276:25) at Module.require (module.js:353:17) at require (internal/module.js:12:17) at Object. (/root/nodeclub/node_modules/mocha/bin/_mocha:7:15) at Module._compile (module.js:409:26) at Object.Module._extensions…js (module.js:416:10) at Module.load (module.js:343:32) at Function.Module._load (module.js:300:12) at Function.Module.runMain (module.js:441:10) make: *** [test] Error 1