On Wed, 30 Sep 2020 17:55:12 +0100, RobH wrote:

> On 30/09/2020 16:14, Martin Gregorie wrote:
>> read -n1 -s
>
> Running the read -nl -s in a terminal,

ITYM "read -n1 -s"
(note that the character following the -n is a "digit one" (1) not a
"lowercase letter L" (l) )

> just hangs, as it waiting for some other command maybe

No, it's waiting for your input.
It's the equivalent to "Hit any key to continue", albeit a bit sparse
(The author could have written
  read -n1 -s -p "Hit any key to continue"
)

For the "read" builtin, "One  line  is  read  from  the  standard input".
The -n1 causes "read" to return after reading 1 character
The -s causes "read" to not echo the consumed character back to the
terminal.


--
Lew Pitcher
"In Skills, We Trust"

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