r-base
3.2.3 já está disponível no repositório CRAN do Ubuntu , pelo menos para 14.04:
$ wget -qO - https://cran.r-project.org/bin/linux/ubuntu/trusty/Packages.gz | zgrep -F 3.2.3 | head
Version: 3.2.3-1trusty0
Filename: trusty/r-doc-pdf_3.2.3-1trusty0_all.deb
Version: 3.2.3-1trusty0
Filename: trusty/r-base-core_3.2.3-1trusty0_i386.deb
Version: 3.2.3-1trusty0
Filename: trusty/r-base-core_3.2.3-1trusty0_amd64.deb
Version: 3.2.3-1trusty0
Depends: r-base-core (= 3.2.3-1trusty0), r-base-dev (= 3.2.3-1trusty0)
Filename: trusty/r-base-core-dbg_3.2.3-1trusty0_amd64.deb
Version: 3.2.3-1trusty0