How can I get Lazarus working on the new Debian release?

There is much information on the web and it seems like everybody says something different.

I have a script here which works for the past release of Debian, but I don't know if it is still working. And what are keys good for?

#!/bin/sh
gpg --keyserver hkp://pgp.mit.edu:11371 --recv-keys 6A11800F gpg --export 6A11800F | apt-key add -
echo "deb http://www.hu.freepascal.org/lazarus/ lazarus-stable universe" \

/etc/apt/sources.list.d/lazarus.list

apt-get update
apt-get install lazarus

Rainer Stratmann wrote

How can I get Lazarus working on the new Debian release? There is much information on the web and it seems like everybody says something different.

What I do is install FPC from the latest binary archive, then compile the latest stable version. In some cases (e.g. SPARC) these are not the same. After that I use the stable FPC to compile the latest stable Lazarus from source.

I have a script here which works for the past release of Debian, but I don't know if it is still working. And what are keys good for?

The keys tell the installer that the server is OK.