I installed grunt-cli both locally and globally and I can see the same in both local and global paths.
To test if the installation works, when I tried to run
grunt -h
it shows following
>> Local Npm module "grunt-cli" not found. Is it installed?
Grunt: The JavaScript Task Runner (v0.4.5)
Usage
grunt [options] [task [task ...]]
Options
--help, -h Display this help text.
--base Specify .......
When I run grunt -v, following is part of its output
Registering "grunt-cli" local Npm module tasks.
Reading /Users/cominventor/myproject/node_modules/grunt-cli/package.json...OK
Parsing /Users/cominventor/myproject/node_modules/grunt-cli/package.json...OK
>> Local Npm module "grunt-cli" not found. Is it installed?
To install locally, I ran the following command (suggested by @Aruna)
npm install grunt --save-dev
npm install grunt-cli --save-dev
and got the following output for the second command
npm ERR! Darwin 16.0.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "install" "grunt-cli" "--save-dev"
npm ERR! node v6.6.0
npm ERR! npm v3.10.7
npm ERR! code ENOSELF
npm ERR! Refusing to install grunt-cli as a dependency of itself
npm ERR!
Any clues what am I missing here?