I have Ubuntu 16.04 and after update of R to 3.4.1 version it does not see my packages even though they have also been updated:
> library(dplyr)
Error in library(dplyr) : there is no package called ‘dplyr’
Packages are there:
$ ls ~/R/x86_64-pc-linux-gnu-library/3.4/ | grep plyr
dplyr
plyr
My .libPaths:
> .libPaths()
[1] "/usr/local/lib/R/site-library" "/usr/lib/R/site-library" "/usr/lib/R/library"
Setting .libPaths to desired path does the thing just for one session. I'd like it to be permanent.
I also tried to set the variables R_LIBS, R_LIBS_SITE and R_LIBS_USER to desired path as indicated here but it worked only in the console (didn't work in RStudio).