Remove from the cfg/config.json and replay it with your own Bot Token.
Example:
{
"token": "adfasdf39890723fsdf0544032ee4dfsdfqsf",
"prefix": ".",
"version": "0.6",
"dev": "174101569472561153"
}apt-get install screen #as root
chmod +x start.sh
bash start.sh
screen -r # to check if the Bot running without Problems