sudo adduser teamspeak
su teamspeak
wget https://files.teamspeak-services.com/releases/server/3.9.0/teamspeak3-server_linux_amd64-3.9.0.tar.bz2
tar xvf teamspeak3-server_linux_amd64-3.9.0.tar.bz2
cd teamspeak3-server_linux_amd64 && mv * /home/teamspeak && cd .. && rm -rf teamspeak3*
su root
touch /home/teamspeak/.ts3server_license_accepted
chown -R teamspeak:teamspeak /home/teamspeak
vi  /lib/systemd/system/teamspeak.service
----------------------------------------------
[Unit]
Description=TeamSpeak 3 Server
After=network.target

[Service]
WorkingDirectory=/home/teamspeak/
User=teamspeak
Group=teamspeak
Type=forking
ExecStart=/home/teamspeak/ts3server_startscript.sh start inifile=ts3server.ini
ExecStop=/home/teamspeak/ts3server_startscript.sh stop
PIDFile=/home/teamspeak/ts3server.pid
RestartSec=15
Restart=always

[Install]
WantedBy=multi-user.target
------------------------------------------------
systemctl --system daemon-reload
systemctl enable teamspeak.service
systemctl status teamspeak.service
systemctl start teamspeak.service
iptables -A INPUT -p udp --dport 9987 -j ACCEPT
iptables -A INPUT -p udp --sport 9987 -j ACCEPT
iptables -A INPUT -p tcp --dport 30033 -j ACCEPT
iptables -A INPUT -p tcp --sport 30033 -j ACCEPT
iptables -A INPUT -p tcp --dport 10011 -j ACCEPT
iptables -A INPUT -p tcp --sport 10011 -j ACCEPT
cat /home/teamspeak/logs/ts3server_*