time.sh

#!/bin/bash
set -xue

# Synchronize the system clock with an NTP server
sudo ntpdate pool.ntp.org

# Get the current UTC time
current_utc=$(date -u +"%Y-%m-%d %H:%M:%S")

# Convert the current UTC time to a timestamp
current_timestamp=$(date -d "$current_utc" +"%s")

# Calculate the timestamp for UTC minus one hour
new_timestamp=$((current_timestamp - 3600))

# Convert the new timestamp back to a date string
new_date=$(date -d @$new_timestamp +"%Y-%m-%d %H:%M:%S")

# Set the system date and time to the new date
sudo timedatectl set-time "$new_date"

echo "System date and time set to: $new_date"