gyp ERR! configure error
gyp ERR! stack Error: EACCES: permission denied, mkdir '/usr/local/lib/node_modules/@angular/cli/node_modules/node-sass/build'
gyp ERR! System Linux 4.8.0-56-generic
gyp ERR! command "/usr/local/bin/node" "/usr/local/lib/node_modules/@angular/cli/node_modules/node-gyp/bin/node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="
gyp ERR! cwd /usr/local/lib/node_modules/@angular/cli/node_modules/node-sass
gyp ERR! node -v v7.10.0
gyp ERR! node-gyp -v v3.6.2
gyp ERR! not ok
sudo npm install -g @angular/cli