Hello i need install node.js via terminal. After install to system the installator wrote me:
Make sure that /usr/local/bin is your $PATH.
After running
echo "$PATH"
It returned
/usr/local/git/bin:/usr/local/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/git/bin:/usr/local/bin:/usr/local/git/bin:/usr/local/lib
But when i want install by npm install -g less 
It shows me:
npm WARN checkPermissions Missing write access to /usr/local/lib/node_modules
/usr/local/lib
npm ERR! Darwin 15.5.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "install" "-g" "less"
npm ERR! node v6.3.1
npm ERR! npm  v3.10.3
npm ERR! path /usr/local/lib/node_modules
npm ERR! code EACCES
npm ERR! errno -13
npm ERR! syscall access
npm ERR! Error: EACCES: permission denied, access '/usr/local/lib/node_modules'
npm ERR!     at Error (native)
npm ERR!  { Error: EACCES: permission denied, access '/usr/local/lib/node_modules'
npm ERR!     at Error (native)
npm ERR!   errno: -13,
npm ERR!   code: 'EACCES',
npm ERR!   syscall: 'access',
npm ERR!   path: '/usr/local/lib/node_modules' }
npm ERR! 
npm ERR! Please try running this command again as root/Administrator.
npm ERR! Please include the following file with any support request:
npm ERR!     /Users/erikmargony/npm-debug.log
What can i do to install it? I feel realy lost.
 
     
    