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

[Reinhard Kotucha]

On 2012-09-03 at 18:55:02 -0500, Kevin Godby wrote:

 > [...]
 > First, a dummy /usr/bin/perldoc executable is provided by the perl
 > Ubuntu package. This perldoc script contains only the following:
 > 
 >     #!/bin/sh
 >     # place-holder, diverted by perl-doc
 >     echo You need to install the perl-doc package to use this program. >&2
 >     exit 1
 > 
 > So the call to TeXLive::TLUtils::which("perldoc") returns
 > "/usr/bin/perldoc" and therefore the noperldoc option is set to 0.
 > [...]

It seems to be sufficient look to into the perldoc file and determine
from the shebang line whether it's a Perl or Shell script.  The "real"
perldoc script begins with #!/usr/bin/perl .

Regards,
  Reinhard

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