I'm sure this is easy for the pros who hang out here, but I'm lost
info tar para 4.6 gives an example - two parts confuse me
tar --directory=srcdir --create --file=- .
I'm confused by the 3rd and 4th args
in the 3rd, "--file=-" apparently <dash> is used as a wild card. I don't see this convention explained in the tar documentation and don't recognize it based on my limited undrstanding of the POSIX regular expression syntax
the 4th arg consists of a period - I dont understand why it is there
Maybe someone can help lift my ignorance