upgrade global angular cli code example

Example 1: update angular cli globally

npm update @angular/cli -g

Example 2: ng update @angular/core @angular/cli

npm uninstall -g angular-cli
npm install -g @angular/cli@latest

Example 3: update angular cli

For updating angular cli type this command :
ng update @angular/cli @angular/core

Example 4: ng update @angular/core @angular/cli

rm -rf node_modules
npm uninstall --save-dev angular-cli
npm install --save-dev @angular/cli@latest
npm install