Sometimes it is desirable for vacation to use a database file different from its default of .vacation.db. Perhaps you want to keep all your vacation files in one directory�say, .vacation. If your message file were there and your database file were there, you might invoke vacation like this:

|"/usr/ucb/vacation -f .vacation/data.db -m .vacation/message you"

The -f command-line switch causes vacation to use a database different from its default. Only one -f can be specified. If you attempt to specify more than one database with multiple -f command-line switches, only the last one listed will be used.