1. npm ERR! Refusing to delete: /usr/local/bin/grunt not in /usr/local/lib/node_modules/grunt-cli
2. File exists: /usr/local/bin/grunt
3. Move it away, and try again.
4.  
5. npm ERR! System Linux 3.16.0-4-amd64
6. npm ERR! command "/usr/bin/nodejs" "/usr/bin/npm" "install" "-g" "grunt" "grunt-cli" "bower"
7. npm ERR! cwd /usr/src/freeswitch-1.6.12/html5/verto/verto_communicator
8. npm ERR! node -v v0.10.29
9. npm ERR! npm -v 1.4.21
10. npm ERR! path /usr/local/bin/grunt
11. npm ERR! code EEXIST
12. /usr/local/bin/grunt -> /usr/local/lib/node_modules/grunt/bin/grunt
13. /usr/local/bin/bower -> /usr/local/lib/node_modules/bower/bin/bower
14. npm ERR!
15. npm ERR! Additional logging details can be found in:
16. npm ERR!     /usr/src/freeswitch-1.6.12/html5/verto/verto_communicator/npm-debug.log
17. npm ERR! not ok code 0
18.  
19. module.js:340
20.     throw err;
21.           ^
22. Error: Cannot find module 'grunt-cli/bin/grunt'
23.     at Function.Module._resolveFilename (module.js:338:15)
24.     at Function.Module._load (module.js:280:25)
25.     at Module.require (module.js:364:17)
26.     at require (module.js:380:17)
27.     at Object.<anonymous> (/usr/local/lib/node_modules/grunt/bin/grunt:3:1)
28.     at Module._compile (module.js:456:26)
29.     at Object.Module._extensions..js (module.js:474:10)
30.     at Module.load (module.js:356:32)
31.     at Function.Module._load (module.js:312:12)
32.     at Function.Module.runMain (module.js:497:10)
33.