14.04 - Unable to do sudo apt-get update - Ask Ubuntu

followed this , this, nothing changed. tried choose best server in software , updates, got error saying "no download server found". internet connection working , able ping 8.8.8.8 , open ftp server's page.

the output of sudo apt-get update:

err http://extras.ubuntu.com trusty inrelease err http://extras.ubuntu.com trusty release.gpg   unable connect 127.0.0.1:8080: err http://dl.google.com stable inrelease err http://dl.google.com stable release.gpg   unable connect 127.0.0.1:8080: ign https://deb.nodesource.com trusty inrelease err http://archive.ubuntu.com trusty inrelease         err http://archive.ubuntu.com trusty-updates inrelease err http://archive.ubuntu.com trusty-backports inrelease err http://archive.ubuntu.com trusty-security inrelease ign https://deb.nodesource.com trusty release.gpg err http://archive.ubuntu.com trusty release.gpg   unable connect 127.0.0.1:8080: err http://archive.ubuntu.com trusty-updates release.gpg   unable connect 127.0.0.1:8080: err http://archive.ubuntu.com trusty-backports release.gpg   unable connect 127.0.0.1:8080: err http://ppa.launchpad.net trusty inrelease err http://ppa.launchpad.net trusty inrelease err http://ppa.launchpad.net trusty inrelease err http://ppa.launchpad.net trusty inrelease err http://ppa.launchpad.net trusty inrelease err http://ppa.launchpad.net trusty inrelease err http://ppa.launchpad.net trusty inrelease err http://ppa.launchpad.net trusty inrelease err http://ppa.launchpad.net trusty inrelease err http://ppa.launchpad.net trusty inrelease ign https://deb.nodesource.com trusty release err http://archive.ubuntu.com trusty-security release.gpg   unable connect 127.0.0.1:8080: err http://ppa.launchpad.net trusty inrelease err http://ppa.launchpad.net trusty inrelease err http://ppa.launchpad.net trusty inrelease err http://ppa.launchpad.net trusty release.gpg   unable connect 127.0.0.1:8080: err http://ppa.launchpad.net trusty release.gpg   unable connect 127.0.0.1:8080: err http://ppa.launchpad.net trusty release.gpg   unable connect 127.0.0.1:8080: err http://ppa.launchpad.net trusty release.gpg   unable connect 127.0.0.1:8080: err http://ppa.launchpad.net trusty release.gpg   unable connect 127.0.0.1:8080: err http://ppa.launchpad.net trusty release.gpg   unable connect 127.0.0.1:8080: err http://ppa.launchpad.net trusty release.gpg   unable connect 127.0.0.1:8080: ign https://deb.nodesource.com trusty/main sources/diffindex err http://ppa.launchpad.net trusty release.gpg   unable connect 127.0.0.1:8080: err http://ppa.launchpad.net trusty release.gpg   unable connect 127.0.0.1:8080: err http://ppa.launchpad.net trusty release.gpg   unable connect 127.0.0.1:8080: err http://ppa.launchpad.net trusty release.gpg   unable connect 127.0.0.1:8080: err http://ppa.launchpad.net trusty release.gpg   unable connect 127.0.0.1:8080: err http://ppa.launchpad.net trusty release.gpg   unable connect 127.0.0.1:8080: ign https://deb.nodesource.com trusty/main amd64 packages/diffindex ign https://deb.nodesource.com trusty/main i386 packages/diffindex ign https://deb.nodesource.com trusty/main translation-en_in ign https://deb.nodesource.com trusty/main translation-en err https://deb.nodesource.com trusty/main sources   failed connect 127.0.0.1 port 8080: connection refused err https://deb.nodesource.com trusty/main amd64 packages   failed connect 127.0.0.1 port 8080: connection refused err https://deb.nodesource.com trusty/main i386 packages   failed connect 127.0.0.1 port 8080: connection refused reading package lists... done w: failed fetch http://archive.ubuntu.com/ubuntu/dists/trusty/inrelease   w: failed fetch http://archive.ubuntu.com/ubuntu/dists/trusty-updates/inrelease   w: failed fetch http://archive.ubuntu.com/ubuntu/dists/trusty-backports/inrelease   w: failed fetch http://archive.ubuntu.com/ubuntu/dists/trusty-security/inrelease   w: failed fetch http://extras.ubuntu.com/ubuntu/dists/trusty/inrelease   w: failed fetch http://ppa.launchpad.net/docky-core/ppa/ubuntu/dists/trusty/inrelease   w: failed fetch http://ppa.launchpad.net/gezakovacs/ppa/ubuntu/dists/trusty/inrelease   w: failed fetch http://dl.google.com/linux/chrome/deb/dists/stable/inrelease   w: failed fetch http://ppa.launchpad.net/kubuntu-ppa/backports/ubuntu/dists/trusty/inrelease   w: failed fetch http://ppa.launchpad.net/n-muench/vlc/ubuntu/dists/trusty/inrelease   w: failed fetch http://ppa.launchpad.net/noobslab/icons/ubuntu/dists/trusty/inrelease   w: failed fetch http://ppa.launchpad.net/noobslab/themes/ubuntu/dists/trusty/inrelease   w: failed fetch http://ppa.launchpad.net/snwh/pulp/ubuntu/dists/trusty/inrelease   w: failed fetch http://ppa.launchpad.net/strukturag/libde265/ubuntu/dists/trusty/inrelease   w: failed fetch http://ppa.launchpad.net/transmissionbt/ppa/ubuntu/dists/trusty/inrelease   w: failed fetch http://ppa.launchpad.net/videolan/master-daily/ubuntu/dists/trusty/inrelease   w: failed fetch http://ppa.launchpad.net/webupd8team/java/ubuntu/dists/trusty/inrelease   w: failed fetch http://ppa.launchpad.net/webupd8team/sublime-text-3/ubuntu/dists/trusty/inrelease   w: failed fetch http://ppa.launchpad.net/webupd8team/tor-browser/ubuntu/dists/trusty/inrelease   w: failed fetch http://extras.ubuntu.com/ubuntu/dists/trusty/release.gpg  unable connect 127.0.0.1:8080: w: failed fetch http://dl.google.com/linux/chrome/deb/dists/stable/release.gpg  unable connect 127.0.0.1:8080: w: failed fetch http://archive.ubuntu.com/ubuntu/dists/trusty/release.gpg  unable connect 127.0.0.1:8080: w: failed fetch http://archive.ubuntu.com/ubuntu/dists/trusty-updates/release.gpg  unable connect 127.0.0.1:8080: w: failed fetch http://archive.ubuntu.com/ubuntu/dists/trusty-backports/release.gpg  unable connect 127.0.0.1:8080: w: failed fetch http://archive.ubuntu.com/ubuntu/dists/trusty-security/release.gpg  unable connect 127.0.0.1:8080: w: failed fetch http://ppa.launchpad.net/docky-core/ppa/ubuntu/dists/trusty/release.gpg  unable connect 127.0.0.1:8080: w: failed fetch http://ppa.launchpad.net/gezakovacs/ppa/ubuntu/dists/trusty/release.gpg  unable connect 127.0.0.1:8080: w: failed fetch http://ppa.launchpad.net/kubuntu-ppa/backports/ubuntu/dists/trusty/release.gpg  unable connect 127.0.0.1:8080: w: failed fetch http://ppa.launchpad.net/n-muench/vlc/ubuntu/dists/trusty/release.gpg  unable connect 127.0.0.1:8080: w: failed fetch http://ppa.launchpad.net/noobslab/icons/ubuntu/dists/trusty/release.gpg  unable connect 127.0.0.1:8080: w: failed fetch http://ppa.launchpad.net/noobslab/themes/ubuntu/dists/trusty/release.gpg  unable connect 127.0.0.1:8080:     w: failed fetch http://ppa.launchpad.net/snwh/pulp/ubuntu/dists/trusty/release.gpg  unable connect 127.0.0.1:8080: w: failed fetch http://ppa.launchpad.net/strukturag/libde265/ubuntu/dists/trusty/release.gpg  unable connect 127.0.0.1:8080: w: failed fetch http://ppa.launchpad.net/transmissionbt/ppa/ubuntu/dists/trusty/release.gpg  unable connect 127.0.0.1:8080: w: failed fetch http://ppa.launchpad.net/videolan/master-daily/ubuntu/dists/trusty/release.gpg  unable connect 127.0.0.1:8080: w: failed fetch http://ppa.launchpad.net/webupd8team/java/ubuntu/dists/trusty/release.gpg  unable connect 127.0.0.1:8080: w: failed fetch http://ppa.launchpad.net/webupd8team/sublime-text-3/ubuntu/dists/trusty/release.gpg  unable connect 127.0.0.1:8080: w: failed fetch http://ppa.launchpad.net/webupd8team/tor-browser/ubuntu/dists/trusty/release.gpg  unable connect 127.0.0.1:8080: w: failed fetch https://deb.nodesource.com/node_4.x/dists/trusty/main/source/sources  failed connect 127.0.0.1 port 8080: connection refused w: failed fetch https://deb.nodesource.com/node_4.x/dists/trusty/main/binary-amd64/packages  failed connect 127.0.0.1 port 8080: connection refused w: failed fetch https://deb.nodesource.com/node_4.x/dists/trusty/main/binary-i386/packages  failed connect 127.0.0.1 port 8080: connection refused w: index files failed download. have been ignored, or old ones used instead. w: duplicate sources.list entry http://dl.google.com/linux/chrome/deb/ stable/main amd64 packages (/var/lib/apt/lists/dl.google.com_linux_chrome_deb_dists_stable_main_binary-amd64_packages) 

edit 1: wanted run sudo apt-get update , got above errors repos. checked server using update repos(from software , updates). while choosing best available server, got error saying "no download server found". additionally, not using proxy server.

edit 2: output host archive.ubuntu.com:

archive.ubuntu.com has address 91.189.88.161 archive.ubuntu.com has address 91.189.88.149 archive.ubuntu.com has address 91.189.88.162 archive.ubuntu.com has address 91.189.88.152 archive.ubuntu.com has ipv6 address 2001:67c:1360:8001::17 archive.ubuntu.com has ipv6 address 2001:67c:1560:8001::11 archive.ubuntu.com has ipv6 address 2001:67c:1360:8001::21 archive.ubuntu.com has ipv6 address 2001:67c:1560:8001::14 

output host archive.ubuntu.com 8.8.8.8:

using domain server: name: 8.8.8.8 address: 8.8.8.8#53 aliases:   archive.ubuntu.com has address 91.189.88.161 archive.ubuntu.com has address 91.189.88.149 archive.ubuntu.com has address 91.189.88.162 archive.ubuntu.com has address 91.189.88.152 archive.ubuntu.com has ipv6 address 2001:67c:1360:8001::17 archive.ubuntu.com has ipv6 address 2001:67c:1560:8001::11 archive.ubuntu.com has ipv6 address 2001:67c:1360:8001::21 archive.ubuntu.com has ipv6 address 2001:67c:1560:8001::14 

solved: had used application had put proxy setting whole system. removing following line /etc/apt/apt.conf has solved problem: acquire::http::proxy "http://10.1.3.1:8080/"; thank you!