netselect(1) on Linux
The text 2b2cfdf3b8c4, as Debian 6.0 (Squeeze), Debian 5.0 (Lenny), Debian 4.0 (Etch), Debian 3.1 (Sarge) shipped it.
choose the fastest server automatically
Flags it lists
-
-m -
-s -
-t -
-v -
-vv -
-vvv -
-vvvv