tmux Minecraft start, stop, restart, reload and backup script

start.sh

#!/bin/sh
### BEGIN INIT INFO
# Provides:          Minecraft-Server
# Required-Start:    $all
# Required-Stop:     $remote_fs $syslog $network
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Starts minecraft server at boot time
# Description:       Starts minecraft server at boot time
### END INIT INFO

#dir which contains the server directory
user=your_user
basedir=/home/$user/
backup_path="/home/$user/backups/"
folder_name=$(date +%Y-%m-%d_%H-%M-%S)
world=world

#tmux session name (`basename \"$basedir\"` -> basedir's name)
session="`basename \"$basedir\"`"

if [[ basedir != */ ]]
then
   basedir+="/"
fi

start() {
    tmux new-session -d -s $session
    
    echo "Starting server"
    
    tmux send-keys -t $session:0 "cd $basedir" C-m
    tmux send-keys -t $session:0 "bash startup.sh" C-m
    
    echo "Server started. Attaching session..."
    
    sleep 0.5
    
    tmux attach-session -t $session:0
}

stop() {
    tmux send-keys -t $session:0 "/say Server restarting in 5 minutes. Please get ready to log off." Enter

    # Wait for 1770 seconds (29 minutes and 30 seconds)
    # sleep 300s
    sleep 10s

    tmux send-keys -t $session:0 "stop" C-m
    echo "Stopping server..."
    
    for i in {5..1..-1}
    do
        echo -ne "\rWaiting for shutdown... $i"
        sleep 1
    done
    echo ""
    echo "Killing tmux session"
    tmux kill-session -t $session
    echo "Server stopped"
}

backup() {
    echo "Will start backup from $basedir to $backup_path/$folder_name..."
    echo "Saving the game..."

    tmux send-keys -t $session "/say Beep boop, backup starting..." Enter
    tmux send-keys -t $session "save-off" Enter
    tmux send-keys -t $session "save-all" Enter
    sleep 30

    echo "Copying the files..."
    tmux send-keys -t $session "/say Beep boop, save the world..." Enter
    cp -r $basedir/$world/ $backup_path/$folder_name/

    echo "Removing the old backups..."
    if [ $(ls $backup_path | wc -l) -gt 10 ]
    then
            echo "Remove 1 oldest backup..."
            rm "$backup_path/$(ls $backup_path -t | tail -1)" -rf
    fi

    tmux send-keys -t $session "save-on" Enter
    tmux send-keys -t $session "/say Beep boop, backup finished!" Enter
    echo "Backup success!"
}

reload() {
    tmux send-keys -t $session:0 "stop" C-m
    echo "Stopping server..."
    
    for i in {5..1..-1}
    do
        echo -ne "\rWaiting for shutdown... $i"
        sleep 1
    done
    echo ""
    echo "Killing tmux session"
    tmux kill-session -t $session
    echo "Server stopped"
}

case "$1" in
start)
    start
;;
stop)
    stop
;;
attach)
    tmux attach -t $session
;;
restart)
    backup
    sleep 10
    stop
    sleep 0.8
    echo "Restarting server..."
    sleep 0.8
    start
;;
reload)
    stop
    sleep 0.8
    echo "Reload server..."
    sleep 0.8
    start
;;
*)
echo "Usage: start.sh (start|stop|backup|restart|reload|attach)"
;;
esac

Thanks to @Jofkos and his script:
https://gist.github.com/Jofkos/86a4936c91999082d6a7