Perl is a high-level, general-purpose, interpreted, dynamic programming language. Perl was originally developed by Larry Wall in 1987 [ http://en.wikipedia.org/wiki/Perl ]
Perl 5 is a highly capable, feature-rich programming language with over 24 years of development.
In general: neither. The advice is to have the full source tree in /opt/ledgersmb/<version>.
[work in progess...]
The PDF and PS invoices are generated using a program called LaTeX which handles the layout and typesetting. The actual LaTeX files are creating using Template Toolkit with extensions for LaTeX. These extensions are in the Template::Latex package available from CPAN. The software then generates a LaTeX file which is then processed to create a PDF or PS.
Is there a place where we could buy some consulting for LedgerSMB?
or a minimal setup according to our specs?
Take a look at Commercial Support
Yes, its open source. The tools we use (Perl, PostsgreSQL, Apache ++) are also open source.
Open source means that the source code of the software is available for free to everyone and you can modify the code and distribute it yourself. https://en.wikipedia.org/wiki/Open_source
Look for a place to contribute. This means not only programming, but also documentation, theme design, art work, or architectural design.
Quite a few users find some of the terminology and accounting processes a little confusing at first. Some of the more popular small business accounting packages tend to hide these aspects of book-keeping from users for simplicity, so with the current user interface there is often some new ideas to grasp.
First step is the manual - the LedgerSMB manual is free and highly recommended reading.
The table below lists the compatibility of LedgerSMB versions with PostgreSQL versions. Products for which support has ceased due to End-of-Life date being reached are not listed and should not be used.