Erro de Permissão [Instalação Cordova Ionic]

Estou com o node v6.9.5 e com o npm 4.2.0 porém quando uso o comando npm install -g cordova ionic

apresenta vários erros!

npm WARN deprecated node-uuid@1.4.7: use uuid module instead
npm WARN deprecated minimatch@0.2.14: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue
npm WARN deprecated minimatch@0.3.0: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue
npm WARN deprecated minimatch@2.0.10: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue
npm WARN deprecated node-uuid@1.3.3: use uuid module instead

e depois que instala apresenta esses erros

npm WARN In ionic@2.2.1 replacing bundled version of cross-spawn with cross-spawn@4.0.2
npm WARN In ionic@2.2.1 replacing bundled version of semver with semver@4.2.0
npm WARN In ionic@2.2.1 replacing bundled version of mime-types with mime-types@2.0.14
npm WARN In ionic@2.2.1 replacing bundled version of form-data with form-data@0.2.0
npm WARN In ionic@2.2.1 replacing bundled version of request with request@2.51.0
npm WARN In ionic@2.2.1 replacing bundled version of ionic-app-lib with ionic-app-lib@2.2.0

quando verifico a versão do cordova e do ionic, pede para que eu instale esses dois pacotes

npm install -g ios-sim

npm install -g ios-deploy

porém quanto tento instalar os dois, dá erro de permissão

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