Recently I discovered a set of command line tools that allow you to interact with the trash can: trash-cli. Normally only GUI file managers like Nautilus will use the trash can, if you delete files on the command line using rm or rmdir the trash can is bypassed and files are deleted immediately.
crontab
Control Your Trash
Running jobs from desktop calendar applications
A follow-up on a previous post regarding the possibility to use ICalendar files as a replacement for crontab.
