2.10 FAQ

Q: How can I set a specific CRAN mirror permanently in R, so it won’t ask me again which mirror to choose?
A: Add the following line to your ~/.Rprofile file:

# add this line to ~/.Rprofile, restart your R session so it takes effect
> options(repos = c(CRAN = "https://mirror.accum.se/mirror/CRAN/"))

Restart your R session so it takes effect.

# to verify that CRAN mirror is set correctly
> getOption("repos")
                                  CRAN 
"https://mirror.accum.se/mirror/CRAN/" 

You can find a list of CRAN mirrors here. The principle is to choose a location close to you.