[TUHS] Shell control through external commands

[Dave Horsfall]

On Mon, 12 Sep 2016, markus schnalke wrote:

> I think I've seen many eary (pre-Shebang and even pre-#-comment) shell 
> scripts start with a colon. Is this only a coincidence with having a 
> comment at the beginning or was the colon character magic in some way?

Minor nit: ":" is not precisely a comment, but an empty label.  Ano no, 
it's not particularly magic in any way, as I recall.

-- 
Dave Horsfall DTM (VK2KFU)  "Those who don't understand security will suffer."