npm ERR! Error: ENOENT, lstat '/usr/local/lib/node_modules/bower/node_modules/mout/function/series.js'

When you try to install Bower by npm as follows:

sudo npm install -g bower

you can encounter the following error:

npm ERR! Error: ENOENT, lstat '/usr/local/lib/node_modules/bower/node_modules/mout/function/series.js'

In my case, it's resolved with upgrading Node.js and npm as follows:

http://izeye.blogspot.kr/2015/01/upgrade-nodejs-and-npm.html