To get more information about the command line interface, use the
$ icalendar -h
view subcommand for a human readable summary of an event:
$ icalendar view myfile.ics
The output will look something like this:
Organiser: Secretary <email@example.com> Attendees: John Doe <firstname.lastname@example.org> Randy <email@example.com> Summary: Yearly evaluation. When: Tue 14 Mar 2017 11:00-12:00 Location: Randy's office Comment: Reminder. Description: Your yearly evaluation is scheduled for next Tuesday. Please be on time.
To use this in terminal based e-mail clients like mutt, add a new mime type (as root):
# cat << EOF > /usr/lib/mime/packages/icalendar text/calendar; icalendar view '%s'; copiousoutput; description=iCalendar text; priority=2 EOF # update-mime