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I always use a proxy to connect to the internet in Windows as well as in previous versions of Ubuntu, but in Ubuntu 11.10 it seems that the proxy settings I set in the GUI are not being applied system-wide.

I can access the internet in Firefox with its own proxy settings. I can access internet in the terminal (i.e. I am able to use apt-get for some small programs). But in Ubuntu software centre or update manager it is not working.

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  • I have the same problem - if I set manual proxy settings in Firefox, I can access the internet, but if I set it to use the system proxy settings (even though they're the same!), connections just time out.
    – Martin McNulty
    Mar 9, 2012 at 12:53
  • I have the same issues but after reading <a href="askubuntu.com/questions/89437/… </a> it worked. The link is : askubuntu.com/questions/89437/… Hope it works for you too.
    – user123190
    Jan 14, 2013 at 13:58

4 Answers 4

Reset to default
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I was having this problem when I first installed Ubuntu 11.10. I don't know which of the following steps solved it, but this is what I did:

  • Open a terminal

  • Run export HTTP_PROXY=http://<myproxy>:<port> to set up the proxy server for that terminal session

  • Run sudo apt-get update

  • At this point, the update manager popped up and asked if I'd like to install c. 300 updates, which I did

  • Restart

  • Install dconf with sudo apt-get install dconf-tools

    or Using Software Center Install via the software center

  • Run dconf-editor, select system > proxy > http and click enable (as per the tutorial in teleblog's answer)

And now it all seems to work :)

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This tutorial worked for me:

First. You must install dconf-tools in the following ways:

sudo apt-get install dconf-tools

or Using Software Center Install via the software center

Second. Run dconf-tool the way:

dconf-editor

Third. In the Configuration Editor menu select System>> proxy

Goto “system >> proxy” change “mode” to manual and select “use-same-proxy“.
Goto “system >> proxy >> http” give your proxy information there and select “enable” option.
Goto “system >> proxy >> https” give your proxy information there, do the same things on ftp part.
Make sure socks have “0” (zero) on “port” and nothing on “Host” field.

http://loewyi.com/info/proxy-problem-google-chrome-ubuntu-11-10/

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    Welcome to Ask Ubuntu! Whilst this may theoretically answer the question, it would be preferable to include the essential parts of the answer here, and provide the link for reference.
    – Stefano Palazzo
    Jan 21, 2012 at 16:44
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Go to system setting>network. There you can manually adjust your proxy settings.

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  • of course i did it. but it does not work for complete system even after clicking "Apply System Wide" button For Eg : i am unable to use internet in update manager and softwrae centre
    – Prakash
    Jan 18, 2012 at 17:48
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You should export proxy by root user

Just type in a terminal:

sudo -s
export http_proxy=http://yourdomain.com:port
apt-get update
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  • 2
    su doesn't work (and has never worked) by default in Ubuntu, for becoming root. You need to use sudo instead. sudo -s is the proper equivalent of su.
    – Eliah Kagan
    Jul 7, 2012 at 13:09

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