Set http/https proxy server in Linux CLI

HTTP:

# export http_proxy="http://10.10.10.254:8080"

HTTPs:

# export https_proxy="https://10.10.10.254:8080"

Where 10.10.10.254 is the IP of Proxy Server, and 8080 is port number.

Remove:

# unset http_proxy
# unset https_proxy

Afterward you can use curl to verify.