Ubuntu ?http proxy?

System-->Preferences-->Network Proxy

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Set http_proxy shell variable

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Type the following command to set proxy server:

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$ export http_proxy=http://server-ip:port/

$ export http_proxy=http://127.0.0.1:3128/

$ export http_proxy=http://proxy-server.mycorp.com:3128/

How do I setup proxy variable for all users?

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To setup the proxy environment variable as a global variable, open /etc/profile file:

# vi /etc/profile

Add the following information:

export http_proxy=http://proxy-server.mycorp.com:3128/

Save and close the file.

How do I use password protected proxy server?

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You can simply use wget as follows:

$ wget --proxy-user=USERNAME --proxy-password=PASSWORD http://path.to.domain.com/some.html

Lynx has following syntax:

$ lynx -pauth=USER:PASSWORD http://domain.com/path/html.file

Curl has following syntax:

$ curl --proxy-user user:password http://url.com/

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$ export http_proxy=http://user:password@server-ip:port/