micha1986 For your convenience, here are your questions along with their answers clearly listed below.
Q. What would be the best practice installing and running the BSD System .... ?
A. If you're transitioning from FreeBSD to GhostBSD, it's recommended to perform a fresh installation using the official GhostBSD ISO media. It is recommended to install GhostBSD on a computer with at least 8 GB of RAM, although it can run adequately with 4 GB. Keeping your GhostBSD system up-to-date by regularly installing available updates is considered best practice. Additionally, it's important to establish a backup and restore strategy to protect valuable data.
Q. Doom emacs was missing some ldd ... could be fault my disc !?
A. It is possible, though the age of a hard disk drive can significantly impact reliability and performance. As a best practice, avoid using disk drives manufactured before 2010.
Q. Are there more limitations to the system in terms of packages ...!?
A. Yes. There may be instances when your requirements differ from the software's original compile-time configuration.
Q. I loved some tools which I used from the FreeBSD package repo ...!?
A. GhostBSD maintains its own ports, derived from FreeBSD ports, which are used to build the GhostBSD package repository. If a package exists in FreeBSD but is unavailable in GhostBSD, it may be due to a build failure. In such cases, please report the issue directly to Eric Turgeon, the GhostBSD project owner.
Q. Are FreeBSD and GhostBSD using the same Kernel!? No. Some modifications have been made to the kernel sources to provide users with a distinct experience; for example, customized branding.