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Update manager and software center fail to update/install due to network connection error. Synaptic can connect, so can web browser and mail application.

I am using a proxy to connect to the internet. Can anybody help me here?

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up vote 0 down vote accepted

The problem is that the Software Centre does not use the system-wide Proxy settings, so you have to configure it separately.

The Ubuntu forums (link) suggest you need to:

  • Set http_proxy, ftp_proxy and https_proxy variables in bash.bashrc
  • Set proxy settings in /etc/apt/apt.conf
  • Set proxy settings in Network Connections -> Proxy in System Settings

Further information can be found on launchpad: here and here

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