Modified ftb server startup script, because theirs is broken af. Will get overwritten on updates if you don't rename it.

start.sh

#!/bin/bash

cd "$(dirname "$0")"

if ! grep -q "eula=true" eula.txt; then
    echo "Do you agree to the Mojang EULA available at https://account.mojang.com/documents/minecraft_eula ?"
    read -N 1 -p "[y/n] " EULA
    if [ "$EULA" = "y" ]; then
        echo "eula=true" > eula.txt
        echo
    fi
fi

java -javaagent:log4jfix/Log4jPatcher-1.0.0.jar -XX:+UseG1GC -XX:+UnlockExperimentalVMOptions -Xmx6144M -Xms4096M @libraries/net/minecraftforge/forge/1.18.2-40.1.47/unix_args.txt nogui