Ubuntu: connection faliure occurs while updating ubuntu 14.04



Question:

I am unable to do an update operation using

sudo apt-get update  

The connection goes to a server with IP 10.30.10.45 and it gets timed out, inspite of being connected to the internet. Please suggest a solution.

The following occurs:

user1@user1-345V3C-345V3C-3540VC-2530VC:~$ sudo apt-get update  [sudo] password for user1:   0% [Connecting to 10.30.10.45 (10.30.10.45)] [Connecting to 10.30.10.45 (10.30.  

I recently tried to install Zotero Libreoffice plugin, which resulted in a faliure. Could it be related to that?

The contents of sources.list is as follows:

# deb cdrom:[Ubuntu 14.04 LTS _Trusty Tahr_ - Release amd64 (20140417)]/ trusty main restricted  # See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to newer versions of the distribution.  deb http://in.archive.ubuntu.com/ubuntu/ trusty main restricted  deb-src http://in.archive.ubuntu.com/ubuntu/ trusty main restricted  ## Major bug fix updates produced after the final release of the distribution.  deb http://in.archive.ubuntu.com/ubuntu/ trusty-updates main restricted  deb-src http://in.archive.ubuntu.com/ubuntu/ trusty-updates main restricted  ## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu team. Also, please note that software in universe WILL NOT receive any review or updates from the Ubuntu security team.  deb http://in.archive.ubuntu.com/ubuntu/ trusty universe  deb-src http://in.archive.ubuntu.com/ubuntu/ trusty universe  deb http://in.archive.ubuntu.com/ubuntu/ trusty-updates universe  deb-src http://in.archive.ubuntu.com/ubuntu/ trusty-updates universe  ## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu team, and may not be under a free licence. Please satisfy yourself as to your rights to use the software. Also, please note that software in multiverse WILL NOT receive any review or updates from the Ubuntu security team.  deb http://in.archive.ubuntu.com/ubuntu/ trusty multiverse  deb-src http://in.archive.ubuntu.com/ubuntu/ trusty multiverse  deb http://in.archive.ubuntu.com/ubuntu/ trusty-updates multiverse  deb-src http://in.archive.ubuntu.com/ubuntu/ trusty-updates multiverse  ## N.B. software from this repository may not have been tested as extensively as that contained in the main release, although it includes newer versions of some applications which may provide useful features. Also, please note that software in backports WILL NOT receive any review or updates from the Ubuntu security team.  deb http://in.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse  deb-src http://in.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse  deb http://in.archive.ubuntu.com/ubuntu/ trusty-security main restricted  deb-src http://in.archive.ubuntu.com/ubuntu/ trusty-security main restricted  deb http://in.archive.ubuntu.com/ubuntu/ trusty-security universe  deb-src http://in.archive.ubuntu.com/ubuntu/ trusty-security universe  deb http://in.archive.ubuntu.com/ubuntu/ trusty-security multiverse  deb-src http://in.archive.ubuntu.com/ubuntu/ trusty-security multiverse  ## Uncomment the following two lines to add software from Canonical's 'partner' repository. This software is not part of Ubuntu, but is offered by Canonical and the respective vendors as a service to Ubuntu users.  deb http://archive.canonical.com/ubuntu trusty partner  # deb-src http://archive.canonical.com/ubuntu trusty partner  ## This software is not part of Ubuntu, but is offered by third-party developers who want to ship their latest software.  deb http://extras.ubuntu.com/ubuntu trusty main  deb-src http://extras.ubuntu.com/ubuntu trusty main  deb http://in.archive.ubuntu.com/ubuntu/ trusty-proposed restricted multiverse main universe  

Contents of /etc/hosts

::1     ip6-localhost ip6-loopback    fe00::0 ip6-localnet    ff00::0 ip6-mcastprefix    ff02::1 ip6-allnodes    ff02::2 ip6-allrouters    


Solution:1

Problem solved. It was because of a proxy that was set for getting apt updates. I had once set it while using an office WiFi. So deleted the file in /etc/apt/apt.conf.d/02proxy.


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