And I just figured out how to preset aliases at startup.

There is a ini-file called .perldb sourced!

lanx@nc10-ubuntu:~$ cat .perldb
sub afterinit { $DB::alias{ALIAS}='s/ALIAS/command/' }
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so with your approach I may write

sub afterinit { 
 $DB::doccmd='perldoc';
 $DB::alias{doc}='s/doc/perldoc/'; 
}
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so now I can type:

  DB<2> doc -f print
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and get better results...

... now I just have to figure out the best way to call a shellscript called doc, such that I have the same syntax from shellprompt (and than I can enrich the features of perldoc for my needs 8)

 lanx@nc10-ubuntu:~$ doc -k '=='
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You might look at Devel::Command, which I wrote when I needed to add commands to the debugger.

It's a bit of a hack, as it has to monkeypatch DB::DB with a version that has a Module::Pluggable command loader. A very small command module that just system()s the shell command you want may do it.

Nice really nice! 8)

But actually I'm using the debugger just as a REPL (without the P) and never for debugging, don't you think that my small alias solution is just appropriate? I'm not sure if I'm going to system the script or better avoid forking by useing it as a module.

Anyway if your a debugger expert, do you know how I can configure that the returnvalue of each eval ist printed with x, such that I get a full REPL out of it?

(see also using perldebugger as REPL?)

Cheers Rolf