#linux #services #service #systemctl #debian #ubuntu Create a linux service  Create sh file:  /usr/sbin/hostonline.sh  #!/bin/bash  dt=$(date '+%d/%m/%Y %H:%M:%S');  # echo "$dt"  curl "https://api.telegram.org/bot5517742533:AAHkL0Ea3ueHKRuWw2oCsVPmcgFDH0lMj84/sendmessage?chat_id=1591506805&text=$dt+openvpn+is+online!"  Create service file  /etc/systemd/system/hostonline.service  [Unit]  Description=Host Online Notifier  After=network.target  [Service]  Type=simple  ExecStart=/bin/bash /usr/sbin/hostonline.sh  TimeoutStartSec=0  [Install]  WantedBy=default.target  --------------  systemctl daemon-reload  systemctl enable hostonline.service  Confirm that your test service was created successfully:  systemctl --all | grep hostonline.service  Start your Service  systemctl start hostonline.service  Test it by performing a reboot Zie ook [[Controlling Linux Services Daemons]]