If you try to use typings from within bash, you can get errors like this:
typings install dt!react --save
-bash: !react": event not found
This is a puzzling error, since this is basically what the docs suggest you do – the cause is that “!” is a symbol bash expects.
The correct fix is to quote it with apostrophes (” does not work).
typings install 'dt!react' --save
react
└── (No dependencies)