root@petest1:~# echo "deb http://archive.ubuntu.com/ubuntu trusty main universe" >> /etc/apt/sources.list.d/trusty.sources.list
root@petest1:~#
root@petest1:~# apt-get update
[....]
root@petest1:~# $(which echo) -e "\nPackage: *\nPin: release n=trusty\nPin-Priority: -10" >> /etc/apt/preferences.d/redis-trusty
root@petest1:~#
root@petest1:~# $(which echo) -e "\nPackage: redis-server redis-tools\nPin: release n=trusty\nPin-Priority: 501" >> /etc/apt/preferences.d/redis-trusty
root@petest1:~#
root@petest1:~# apt-get -V -s install -y redis-server
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
   redis-server (2.2.12-1build1)
0 upgraded, 1 newly installed, 0 to remove and 196 not upgraded.
Inst redis-server (2:2.2.12-1build1 Ubuntu:12.04/precise [amd64])
Conf redis-server (2:2.2.12-1build1 Ubuntu:12.04/precise [amd64])
root@petest1:~# apt-get update
[.....]
root@petest1:~# apt-get -V -s install -y redis-server
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
   libjemalloc1 (2.2.5-1)
   redis-tools (2.8.4-2)
The following NEW packages will be installed:
   libjemalloc1 (2.2.5-1)
   redis-server (2.8.4-2)
   redis-tools (2.8.4-2)
0 upgraded, 3 newly installed, 0 to remove and 196 not upgraded.
Inst libjemalloc1 (2.2.5-1 Ubuntu:12.04/precise [amd64])
Inst redis-tools (2:2.8.4-2 Ubuntu:14.04/trusty [amd64])
Inst redis-server (2:2.8.4-2 Ubuntu:14.04/trusty [amd64])
Conf libjemalloc1 (2.2.5-1 Ubuntu:12.04/precise [amd64])
Conf redis-tools (2:2.8.4-2 Ubuntu:14.04/trusty [amd64])
Conf redis-server (2:2.8.4-2 Ubuntu:14.04/trusty [amd64])
root@petest1:~#