I tried to install newman globally but no luck and here is what I did: First I installed newman as follows: Then I ran the command newman -h in another command
nativescript-cli
spryker
abide
azure-image-builder
xgboost
steamos
web-scripting
swiftlint
software-update
xcode9.4
outlook.application
angularjs-resource
pinnacle-cart
xwayland
uipath-orchestrator
btsnoop
apollo-server-koa
asplinkbutton
xeus-cling
notify
drop-database
webpack-dev-server
x-editable
exceptionhandler
wrangle
google-anthos
screenshotexception
camel-spring-dsl
agm-core
vgg-net