Confused on Server JAR FIle

 . Default Vanilla 1.19.3
 BungeeCord (#1680)
 Default
 forge.jar (Java 8)
 Forge run.sh
 Forge run.sh
 Forge start.sh
 Forge startserver.sh
 Geyser (#218
 Kettle 1.12.2
 Minecraft Vanilla 1.20.1
 Paper 1.16.4
 Paper 1.16.5
 Paper 1.16.5 Java 16
 Paper 1.17.1
 Paper 1.18
 Paper 1.18.1 (#215)
 Paper 1.18.2 (#366)
 Paper 1.19
 Paper 1.19.1
 Paper 1.19.2
 Paper 1.19.3
 Paper 1.19.4
 Paper 1.20.1
 Spigot 1.7.10
 Spigot 1.8.8
 Spigot 1.9.4
 Spigot 1.16.5
 Spigot 1.16.5 Java 16
 Spigot 1.17
 Spigot 1.17.1
 Spigot 1.18.1
 Spigot 1.18.2
 Spigot 1.19
 Spigot 1.19.1
 Spigot 1.19.2
 Spigot 1.19.3
 Spigot 1.19.4
 Spigot 1.20
 Spigot 1.20.1
 SpongeVanilla 1.12.2 7.1.6
 Tuinity (#234)
 Velocity Proxy (3.1.1)
 Waterfall Proxy (#476)