mu-find(1) on Linux
The text 44592be51dfd, as Debian 7 (Wheezy) shipped it.
find e-mail messages in the mu database.
Flags it lists
-
--bookmark -
--exec -
--fields -
--format -
--include-unreadable -
--summary -
--summary-len -
--threads -
-b -
-f -
-t