install.packages('pbkrtest')

> install.packages('pbkrtest')
Installing package into '/home/rstudio/R/x86_64-pc-linux-gnu-library/4.1'
(as 'lib' is unspecified)
trying URL 'https://cloud.r-project.org/src/contrib/pbkrtest_0.5.1.tar.gz'
Content type 'application/x-gzip' length 246327 bytes (240 KB)
==================================================
downloaded 240 KB

* installing *source* package 'pbkrtest' ...
** package 'pbkrtest' successfully unpacked and MD5 sums checked
** using staged installation
** R
** data
*** moving datasets to lazyload DB
** inst
** byte-compile and prepare package for lazy loading
** help
*** installing help indices
** building package indices
** installing vignettes
** testing if installed package can be loaded from temporary location
** testing if installed package can be loaded from final location
** testing if installed package keeps a record of temporary installation path
* DONE (pbkrtest)

The downloaded source packages are in
    '/tmp/RtmpqOB5Ww/downloaded_packages'