splitvt(1) on Linux
The text 0498daa1369e, as Debian 8 (Jessie), Debian 7 (Wheezy) shipped it.
run two shells in a split window
Flags it lists
-
-bottom -
-f -
-login -
-lower -
-nologin -
-norc -
-rcfile -
-s -
-t -
-upper -
-v