Comment 4 for bug 601916

confirming for 16.04

E: Failed to fetch mirror://mirrors.ubuntu.com/mirrors.txt/dists/xenial-security/main/i18n/Translation-en 404 Not Found [Mirror: http://linux.psu.ru/ubuntu/]
E: Some index files failed to download. They have been ignored, or old ones used instead.

However it would be sane to try to cycle for next one in ~my~ http://mirrors.ubuntu.com/mirrors.txt
---
http://mirror.yandex.ru/ubuntu/
http://linux.psu.ru/ubuntu/
http://mirror.logol.ru/ubuntu/
http://mirror.timeweb.ru/ubuntu/
http://linux.nsu.ru/ubuntu/
http://mirror.corbina.net/ubuntu/
http://mirror.rol.ru/ubuntu/
http://archive.ubuntu.com/ubuntu/
---

Package: apt
Essential: yes
State: installed
Automatically installed: no
Version: 1.2.12~ubuntu16.04.1
Priority: important
Section: admin
Maintainer: Ubuntu Developers <email address hidden>
Architecture: amd64
Uncompressed Size: 3 384 k
Depends: libapt-pkg5.0 (>= 1.2.2), libc6 (>= 2.15), libgcc1 (>= 1:3.0), libstdc++6 (>= 5.2), init-system-helpers (>= 1.18~), ubuntu-keyring, gpgv | gpgv2, gnupg | gnupg2, adduser
Suggests: aptitude | synaptic | wajig, dpkg-dev (>= 1.17.2), apt-doc, python-apt
Conflicts: apt:i386
Breaks: apt-utils (< 1.1.3), apt-utils:i386 (< 1.1.3), manpages-it (< 2.80-4~), manpages-pl (< 20060617-3~), openjdk-6-jdk (< 6b24-1.11-0ubuntu1~), sun-java5-jdk (> 0), sun-java6-jdk (> 0)
Replaces: bash-completion (< 1:2.1-4.2+fakesync1), bash-completion:i386 (< 1:2.1-4.2+fakesync1), manpages-it (< 2.80-4~), manpages-pl (< 20060617-3~), openjdk-6-jdk (< 6b24-1.11-0ubuntu1~), sun-java5-jdk (> 0), sun-java6-jdk (> 0)
Description: commandline package manager
 This package provides commandline tools for searching and managing as well as querying information about packages as a low-level access to all features of the libapt-pkg library.

 These include:
 * apt-get for retrieval of packages and information about them from authenticated sources and for installation, upgrade and removal of packages together with their dependencies
 * apt-cache for querying available information about installed as well as installable packages
 * apt-cdrom to use removable media as a source for packages
 * apt-config as an interface to the configuration settings
 * apt-key as an interface to manage authentication keys