Hi,
Thanks for posting in Q&A platform.
Based on my knowledge, all these commands are using to configure proxy and there is no difference between these commands.
Attaching the following articles for your reference.
Configure device proxy and Internet connectivity settings
https://learn.microsoft.com/en-us/azure/azure-arc/servers/onboard-portal
https://campus.barracuda.com/product/nextgenfirewallf/doc/53248619/how-to-set-up-and-configure-the-http-proxy/
Please Note: Since the websites are not hosted by Microsoft, the links may change without notice. Microsoft does not guarantee the accuracy of this information.
Best Regards,
Sunny
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