⏰ Scheduling a Reboot in Advance on Debian Linux (Using shutdown)

1. Check Server Time:

• Open a terminal and log in.
• Execute the date command to display the current date and time:

root@ggRock:~# date
Thu 13 Mar 12:56:36 GMT 2025

• Verify that the displayed time and date are accurate. If they are not, adjust the server's time using timedatectl or ntpd.
  For Example: sudo timedatectl set-time 'YYYY-MM-DD HH:MM:SS' or ensure your ntp client is running.

2. Calculate the Time Difference:

• Current time: (Obtain from the date command output)
• Desired reboot time: 5:30 PM
• Time difference: Calculate the difference in hours and minutes, then convert it to total minutes.
• For example, if the current time is 1:00 PM, the time difference would be 4 hours and 30 minutes, or 270 minutes.

3. Schedule the Reboot:

• Log in as root or use sudo.
• Execute the shutdown command, replacing [minutes] with your calculated time difference:
• Example (using the previous calculation of 270 minutes):

root@MediaCityGG:~# shutdown -r +270
Reboot scheduled for Thu 2025-03-13 17:31:35 GMT, use 'shutdown -c' to cancel.

4. Cancel the Reboot (if needed):

• To cancel the scheduled reboot, execute shutdown -c.