We can run display command privildge mode as well as execution mode. Its not like cisco, We can run anywhere. It has very interactive command line prompt.
Yes, in Cisco and some other vendors, you have to be in privilege mode to run the 'show' commands. But in Huawei you can use 'display' command to run the basic display features. But for some display commands you have to be in privilege mode else it would not work
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