[tex-live] tlmgr "Update all installed" via commandline?

[Philip TAYLOR]

Norbert Preining wrote:

> On Di, 28 Aug 2012, Rainer M Krug wrote:
>>> tlmgr update all
>
> In addition to th two answers you already got, why didn't you try
> 	tl[m]gr --help
> or
> 	tlmgr help
> and read down a few lines to the
> 	EXAMPLES
> section?

One very good reason for not doing so in Windows 7 / TeX Live 2011
is that the output is evanescent and ephemeral : a black CMD box
appears, scrolls at high speed, then vanishes like the morning dew,
leaving not a trace behind.

Philip Taylor