How to install cached archives in Ubuntu
After I update my Emacs to the newest version(GNU Emacs 24.1.50.1) through [emacs-snapshot PPA](http://emacs.naquadah.org/) :

    sudo aptitude update
    sudo aptitude safe-upgrade

I got an warning when I use rinari to programming Rails project.

I am tired to wait the author to fix this issue. So I decided to 'roll back' my Emacs to the previous version that I installed.

I find the archives in **/var/cache/apt/archives/** directory:

    /var/cache/apt/archives/emacs-snapshot_2%3a20120608-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot_2%3a20120609-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot_2%3a20120614-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot_2%3a20120615-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot_2%3a20120622-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot_2%3a20120629-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot_2%3a20120701-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot-bin-common_2%3a20120608-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot-bin-common_2%3a20120609-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot-bin-common_2%3a20120614-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot-bin-common_2%3a20120615-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot-bin-common_2%3a20120622-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot-bin-common_2%3a20120629-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot-bin-common_2%3a20120701-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot-common_2%3a20120608-1~ppa1~precise1_all.deb
    /var/cache/apt/archives/emacs-snapshot-common_2%3a20120609-1~ppa1~precise1_all.deb
    /var/cache/apt/archives/emacs-snapshot-common_2%3a20120614-1~ppa1~precise1_all.deb
    /var/cache/apt/archives/emacs-snapshot-common_2%3a20120615-1~ppa1~precise1_all.deb
    /var/cache/apt/archives/emacs-snapshot-common_2%3a20120622-1~ppa1~precise1_all.deb
    /var/cache/apt/archives/emacs-snapshot-common_2%3a20120629-1~ppa1~precise1_all.deb
    /var/cache/apt/archives/emacs-snapshot-common_2%3a20120701-1~ppa1~precise1_all.deb
    /var/cache/apt/archives/emacs-snapshot-gtk_2%3a20120608-1~ppa1~precise1_all.deb
    /var/cache/apt/archives/emacs-snapshot-gtk_2%3a20120609-1~ppa1~precise1_all.deb
    /var/cache/apt/archives/emacs-snapshot-gtk_2%3a20120614-1~ppa1~precise1_all.deb
    /var/cache/apt/archives/emacs-snapshot-gtk_2%3a20120615-1~ppa1~precise1_all.deb
    /var/cache/apt/archives/emacs-snapshot-gtk_2%3a20120622-1~ppa1~precise1_all.deb
    /var/cache/apt/archives/emacs-snapshot-gtk_2%3a20120629-1~ppa1~precise1_all.deb
    /var/cache/apt/archives/emacs-snapshot-gtk_2%3a20120701-1~ppa1~precise1_all.deb

So, How to install the specified version(old version) of Emacs?

How to install cached archives in Ubuntu
===

After I update my Emacs to the newest version(GNU Emacs 24.1.50.1) through [emacs-snapshot PPA](http://emacs.naquadah.org/) :

    sudo aptitude update
    sudo aptitude safe-upgrade

I got an warning when I use rinari to programming Rails project.

I am tired to wait the author to fix this issue. So I decided to 'roll back' my Emacs to the previous version that I installed.

I find the archives in **/var/cache/apt/archives/** directory:

    /var/cache/apt/archives/emacs-snapshot_2%3a20120608-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot_2%3a20120609-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot_2%3a20120614-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot_2%3a20120615-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot_2%3a20120622-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot_2%3a20120629-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot_2%3a20120701-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot-bin-common_2%3a20120608-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot-bin-common_2%3a20120609-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot-bin-common_2%3a20120614-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot-bin-common_2%3a20120615-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot-bin-common_2%3a20120622-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot-bin-common_2%3a20120629-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot-bin-common_2%3a20120701-1~ppa1~precise1_amd64.deb
    /var/cache/apt/archives/emacs-snapshot-common_2%3a20120608-1~ppa1~precise1_all.deb
    /var/cache/apt/archives/emacs-snapshot-common_2%3a20120609-1~ppa1~precise1_all.deb
    /var/cache/apt/archives/emacs-snapshot-common_2%3a20120614-1~ppa1~precise1_all.deb
    /var/cache/apt/archives/emacs-snapshot-common_2%3a20120615-1~ppa1~precise1_all.deb
    /var/cache/apt/archives/emacs-snapshot-common_2%3a20120622-1~ppa1~precise1_all.deb
    /var/cache/apt/archives/emacs-snapshot-common_2%3a20120629-1~ppa1~precise1_all.deb
    /var/cache/apt/archives/emacs-snapshot-common_2%3a20120701-1~ppa1~precise1_all.deb
    /var/cache/apt/archives/emacs-snapshot-gtk_2%3a20120608-1~ppa1~precise1_all.deb
    /var/cache/apt/archives/emacs-snapshot-gtk_2%3a20120609-1~ppa1~precise1_all.deb
    /var/cache/apt/archives/emacs-snapshot-gtk_2%3a20120614-1~ppa1~precise1_all.deb
    /var/cache/apt/archives/emacs-snapshot-gtk_2%3a20120615-1~ppa1~precise1_all.deb
    /var/cache/apt/archives/emacs-snapshot-gtk_2%3a20120622-1~ppa1~precise1_all.deb
    /var/cache/apt/archives/emacs-snapshot-gtk_2%3a20120629-1~ppa1~precise1_all.deb
    /var/cache/apt/archives/emacs-snapshot-gtk_2%3a20120701-1~ppa1~precise1_all.deb

So, How to install the specified version(old version) of Emacs?
