For running a server on Linux or any Unix, you do:
cd /home/server/gtav mono CitizenMP.Server.exe
Make sure you do cd to it first, enter, then mono, and make sure you have moved everything from the bin folder into the gtav folder alongside with the config yml etc.
To do as an sh script, you simply put the cd and mono lines in a text editor and save as a .sh file.
Make sure you have mono-devel/complete properly installed and up to date if you haven’t.
P.S forgive if the exe is slightly diff in name though, haven’t personally touched FR in a while lol