Running examples in ‘rfordummies-Ex.R’ failed
The error most likely occurred in:

> base::assign(".ptime", proc.time(), pos = "CheckExEnv")
> ### Name: ch20
> ### Title: Print examples of chapter 20 of 'R for Dummies'.
> ### Aliases: ch20
> 
> ### ** Examples
> 
> # Chapter 20 - Ten Tips on Working with Packages
> 
> ## Poking Around the Nooks and Crannies of CRAN
> 
> options("repos" = c(CRAN = "http://cran.ma.imperial.ac.uk/"))
> 
> ## Finding Interesting Packages
> 
> ## Installing Packages
> 
> ## Not run: 
> ##D install.packages("fortunes")
> ## End(Not run)
> 
> ## Loading Packages
> 
> library("fortunes")
> 
> ## Reading the Package Manual and Vignette
> 
> library(help=fortunes)

		Information on package ‘fortunes’

Description:

Package:            fortunes
Version:            1.5-4
Date:               2016-12-29
Title:              R Fortunes
Author:             Achim Zeileis (R code) and the R community
                    (fortunes).  Contributions (fortunes and/or code)
                    by Torsten Hothorn, Peter Dalgaard, Uwe Ligges,
                    Kevin Wright, Martin Maechler, Kjetil Brinchmann
                    Halvorsen, Kurt Hornik, Duncan Murdoch, Andy Bunn,
                    Ray Brownrigg, Roger Bivand, Spencer Graves, Jim
                    Lemon, Christian Kleiber, David L. Reiner, Berton
                    Gunter, Roger Koenker, Charles Berry, Marc
                    Schwartz, Michael Dewey, Ben Bolker, Peter Dunn,
                    Sarah Goslee, Simon Blomberg, Bill Venables, Roland
                    Rau, Thomas Petzoldt, Rolf Turner, Mark Leeds,
                    Emmanuel Charpentier, Chris Evans, Paolo Sonego,
                    Peter Ehlers, Detlef Steuer, Tal Galili, Greg Snow,
                    Brian D. Ripley, Michael Sumner, David Winsemius,
                    Liviu Andronic, Brian Diggs, Matthieu Stigler,
                    Michael Friendly, Dirk Eddelbuettel, Richard M.
                    Heiberger, Patrick Burns, Dieter Menne, Andrie de
                    Vries, Barry Rowlingson, Renaud Lancelot, R.
                    Michael Weylandt, Jon Olav Skoien, Francois
                    Morneau, Antony Unwin, Joshua Wiley, Terry
                    Therneau, Bryan Hanson, Henrik Singmann, Eduard
                    Szoecs, Gregor Passolt, John C. Nash.
Maintainer:         Achim Zeileis <Achim.Zeileis@R-project.org>
Description:        A collection of fortunes from the R community.
Imports:            utils
License:            GPL-2 | GPL-3
NeedsCompilation:   no
Packaged:           2016-12-29 12:04:16 UTC; zeileis
Repository:         CRAN
Date/Publication:   2016-12-29 13:50:47
Built:              R 3.6.0; ; 2019-03-09 13:46:15 UTC; unix

Index:

fortunes                R Fortunes

Further information is available in the following vignettes in
directory
‘/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages/fortunes/doc’:

fortunes: R Fortunes: Collected Wisdom (source, pdf)

> ## Not run: 
> ##D vignette("fortunes")
> ## End(Not run)
> 
> ## Updating Packages
> 
> ## Not run: 
> ##D update.packages()
> ## End(Not run)
> 
> ## Unloading Packages
> 
> search()
 [1] ".GlobalEnv"          "package:fortunes"    "package:rfordummies"
 [4] "CheckExEnv"          "package:stats"       "package:graphics"   
 [7] "package:grDevices"   "package:utils"       "package:datasets"   
[10] "package:methods"     "Autoloads"           "package:base"       
> detach(package:fortunes, unload=TRUE)
> 
> ## Forging Ahead with R-Forge
> 
> ## Not run: 
> ##D install.packages("data.table", repos="http://R-Forge.R-project.org")
> ## End(Not run)
> 
> ## Conducting Installations from BioConductor
> 
> source("http://bioconductor.org/biocLite.R")
Installing package into ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages’
(as ‘lib’ is unspecified)
Warning in install.packages("BiocInstaller", repos = a["BioCsoft", "URL"]) :
  'lib = "/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages"' is not writable
Error in install.packages("BiocInstaller", repos = a["BioCsoft", "URL"]) : 
  unable to install packages
Calls: source ... eval.parent -> eval -> eval -> eval -> eval -> install.packages
Execution halted