title: karma start Cannot find module 'jasmine-core'
body: <p>I was getting the following error when I ran "karma start"</p>
  
  <blockquote>
    <p>module.js:340
        throw err;
        ^
    Error: Cannot find module 'jasmine-core'
        at Function.Module._resolveFilename (module.js:338:15)
        at Function.require.resolve (module.js:384:19)
        at initJasmine (/usr/lib/node_modules/karma-jasmine/lib/index.js:8:42)
        at Array.invoke [as 0] (/usr/lib/node_modules/karma/node_modules/di/lib/injector.js:75:15)
        at get (/usr/lib/node_modules/karma/node_modules/di/lib/injector.js:48:43)
        at /usr/lib/node_modules/karma/lib/server.js:137:20
        at Array.forEach (native)
        at Server._start (/usr/lib/node_modules/karma/lib/server.js:136:21)
        at invoke (/usr/lib/node_modules/karma/node_modules/di/lib/injector.js:75:15)
        at Server.start (/usr/lib/node_modules/karma/lib/server.js:101:18)
        at Object.exports.run (/usr/lib/node_modules/karma/lib/cli.js:231:26)
        at Object. (/usr/lib/node_modules/karma/bin/karma:3:23)
        at Module._compile (module.js:456:26)
        at Object.Module._extensions..js (module.js:474:10)
        at Module.load (module.js:356:32)
        at Function.Module._load (module.js:312:12)</p>
  </blockquote>
  
  <p>Does anyone know why this is happening?  I was running karma in a VM.  I tried several npm install commands and nothing worked.  After I shutdown my machine for the night and came back the next day the problem went away and everything is working again. So, I'm not blocked anymore.. Anyone have some thoughts on what could be happening?</p>