DSM linux a nd Apache specifics - need a documentation

[miroslav@fris.cz]

On web there are a lot of sources and tutorials about Linux and Apache. I would expect Synology has some specific guides for DSM, but I couldn't find. The only way is to learn standard Linux and try to find similarity in DSM Linux - very hard and time consuming.
Do anybody know about suitable DSM Linux and Apache tutorials/documentation ? I have been Windows user for last 20 years, so it is not easy for me to get deeper to this DSM specific Linux.
Thanks