Automatic install MC:PE server on Ubuntu

# Automatic install Minecraft: PE server
# Tested on Ubuntu 14.04
# Error? Contact fb.com/dfmcvn
# ----------
# Nhung dieu can luu y
echo "Script nay chi hoat dong voi Ubuntu 14.04 tro len (da test) va Debian (chua test)."
echo "Script nay khong hoat dong tren CentOS va nhung OS khac."
echo "Neu ban khong su dung Ubuntu, vui long bam Ctrl + C."
echo "------------------------------"
echo "Script se bat dau cai dat trong 5 giay..."
sleep 5
# Update, sure vkl, and install something you dont know =))

echo "Cap nhat server len ban moi nhat..."
sleep 2
apt-get update -y

echo "Cai dat nhung thanh phan can thiet..."
sleep 2
apt-get install screen curl -y

# Create MC files server folder
echo "Tao thu muc chua files server.."
sleep 2
cd
mkdir mcpe
cd mcpe
# Download core and default server.properties file.
echo "Tai files can thiet..."
echo "Downloading core..."
curl -sO http://ci.mengcraft.com:8080/job/nukkit/lastBuild/artifact/target/nukkit-1.0-SNAPSHOT.jar
echo "Downloading config (server.properties file)..."
curl -sO https://pastebin.com/raw/yVvYwV5A

# Update Java
echo "Cap nhat JAVa..."
sleep 2
sudo apt-key adv --keyserver keys.gnupg.net --recv-keys 5CB26B26
echo "deb http://www.duinsoft.nl/pkg debs all" | sudo tee -a /etc/apt/sources.list.d/duinsoft.list
sudo apt-get update -y
sudo apt-get install update-sun-jre -y

# Launch server, first time. 768 is amount RAM allowed. Modify it.
echo "Server se khoi dong sau 5 giay"
echo "Sau khi server khoi dong, bam Ctrl + A D de hide console server..."
sleep 7
screen java -Xmx768M -Xms768M -jar nukkit-1.0-SNAPSHOT.jar