Pagina instalacion R para UBUNTU

No se instala paquete plyr

This isn’t an answer to manually installing plyr. This is more answer about why you have to manually install in the first place.

I suspect your CRAN mirror is improperly set. To check, type

options("repos")[[1]][1]

This should return something like:

> options("repos")[[1]][1]
                                    CRAN 
"http://streaming.stat.iastate.edu/CRAN" 
> 

try setting your repo to a different mirror like this:

options(repos="http://streaming.stat.iastate.edu/CRAN")

or use any other mirror of your choice.

Then try loading plyr:

install.packages("plyr")
library("plyr") 

and let us know what happens.

Esto soluciono el problema.
Tenia definido como CRAN a “deb http://cran.cnr.Berkeley.edu/bin/linux/ubuntu trusty/” en sources pero no lo reconocia la consola de R.
Asi que al momento de instalarlo me presenta una pantalla con CRAN’s y seleccione 0 cloud.