Not able to install truffle using npm install -g truffle

Question

I am trying to install truffle and when I run the mentioned command, I get this error:

$npm install -g truffle

npm WARN checkPermissions Missing write access to /usr/local/lib/node_modules/truffle

npm WARN checkPermissions Missing write access to /usr/local/lib/node_modules

/usr/local/lib

`-- truffle@4.1.14


npm ERR! Linux 4.15.0-39-generic

npm ERR! argv "/usr/bin/node" "/usr/bin/npm" "install" "-g" "truffle"

npm ERR! node v8.10.0

npm ERR! npm  v3.5.2

npm ERR! path /usr/local/lib/node_modules/truffle

npm ERR! code EACCES

npm ERR! errno -13

npm ERR! syscall access


npm ERR! Error: EACCES: permission denied, access '/usr/local/lib/node_modules/truffle'

npm ERR!  { Error: EACCES: permission denied, access '/usr/local/lib/node_modules/truffle'

npm ERR!   errno: -13,

npm ERR!   code: 'EACCES',

npm ERR!   syscall: 'access',

npm ERR!   path: '/usr/local/lib/node_modules/truffle' }

Answer 1

You need root access to install truffle, run this command as root and in should work:

sudo npm install -g truffle