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update angular cli globally

npm update @angular/cli -g

update angular cli

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

angular cli global update

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

update angular cli

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

update angular/cli

content_copy
ng update @angular/cli @angular/core