sed(1) on Linux
The text b6e640e319fa, as Debian 2.2 (Potato), Debian 2.1 (Slink) shipped it.
a Stream EDitor
Flags it lists
-
--expression -
--file -
--help -
--quiet -
--silent -
--version -
-V -
-e -
-f -
-h -
-n