Not able to install xkcd fonts

Question

I was trying the xkcd font as per the instructions given in the vignette: vignette(\"xkcd-intro\")

However get an error on the following step:

Answer 1

@dg99 is correct but the issue is that the filename changes in the documentation

download.file("http://simonsoftware.se/other/xkcd.ttf", dest="xkcd.ttf", mode="wb")
system("cp xkcd.tff -t ~/.fonts")

Change the second line to: system("cp xkcd.ttf -t ~/.fonts")