fresh_start             Remove all the installed R packages from a
                        specified library
latest_packages         Displaying the latest installed R packages
rm_latest_packages      Remove the n latest installed R packages
rm_since_packages       removes installed packages according to a
                        specific date
rm_today_packages       Remove the packages installed in the current
                        day
rm_yesterday_packages   Remove the packages installed yesterday
since_packages          Displays installed packages according to a
                        specific date
today_packages          Displays the packages installed in the current
                        day
yesterday_packages      Displays the packages installed yesterday
