gmime-uuencode(1) on Linux
The text fd5a0a3ad819, as Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy) shipped it.
encode a binary file to a text stream
Flags it lists
-
--base64 -
--help -
--version -
-h -
-m -
-v