How to install software or upgrade from an old unsupported release

why

The repositories for older releases that are not supported (like 11.04, 11.10 and 13.04) get moved to an archive server. There are repositories available at http://old-releases.ubuntu.com.

The reason for this is that it is now out of support and no longer receiving updates and security patches.

I would urge you to consider a supported distribution. If your computer is too old in terms of memory or processor then you should consider a distribution such as Lubuntu or Xubuntu.

howto

sed -i -re 's/([a-z]{2}\.)?archive.ubuntu.com|security.ubuntu.com/old-releases.ubuntu.com/g' /etc/apt/sources.list  
apt-get update && apt-get dist-upgrade  

Install nginx test

apt-get install nginx  
root@8baedfd9c592:/# apt-get install vim  
Reading package lists... Done  
Building dependency tree  
Reading state information... Done  
The following additional packages will be installed:  
  bzip2 file libexpat1 libgpm2 libmagic1 libmpdec2 libpython3.5 libpython3.5-minimal libpython3.5-stdlib libssl1.0.0 mime-support vim-common vim-runtime xz-utils
Suggested packages:  
  bzip2-doc gpm ctags vim-doc vim-scripts vim-gnome-py2 | vim-gtk-py2 | vim-gtk3-py2 | vim-athena-py2 | vim-nox-py2
The following NEW packages will be installed:  
  bzip2 file libexpat1 libgpm2 libmagic1 libmpdec2 libpython3.5 libpython3.5-minimal libpython3.5-stdlib libssl1.0.0 mime-support vim vim-common vim-runtime xz-utils
0 upgraded, 15 newly installed, 0 to remove and 23 not upgraded.  
Need to get 12.0 MB of archives.  
After this operation, 58.5 MB of additional disk space will be used.  
Do you want to continue? [Y/n] n  
Abort.  
root@8baedfd9c592:/# apt-get install nginx  
Reading package lists... Done  
Building dependency tree  
Reading state information... Done  
The following additional packages will be installed:  
  fontconfig-config fonts-dejavu-core geoip-database libexpat1 libfontconfig1 libfreetype6 libgd3 libgeoip1 libicu57 libjbig0 libjpeg-turbo8 libjpeg8 libpng16-16 libssl1.0.0 libtiff5 libwebp6 libx11-6
  libx11-data libxau6 libxcb1 libxdmcp6 libxml2 libxpm4 libxslt1.1 nginx-common nginx-core sgml-base ucf xml-core
Suggested packages:  
  libgd-tools geoip-bin fcgiwrap nginx-doc ssl-cert sgml-base-doc debhelper
The following NEW packages will be installed:  
  fontconfig-config fonts-dejavu-core geoip-database libexpat1 libfontconfig1 libfreetype6 libgd3 libgeoip1 libicu57 libjbig0 libjpeg-turbo8 libjpeg8 libpng16-16 libssl1.0.0 libtiff5 libwebp6 libx11-6
  libx11-data libxau6 libxcb1 libxdmcp6 libxml2 libxpm4 libxslt1.1 nginx nginx-common nginx-core sgml-base ucf xml-core
0 upgraded, 30 newly installed, 0 to remove and 23 not upgraded.  
Need to get 15.1 MB of archives.  
After this operation, 55.7 MB of additional disk space will be used.  
Do you want to continue? [Y/n] n