TimeZone Date Time for Debian and Ubuntu.

🛠️ System Maintenance & Timezone Setup Script

A production-ready, interactive Bash script for Debian 10–13 and Ubuntu 18–24 that automates system updates, timezone configuration, and NTP time synchronization — all wrapped in a clean, colorized terminal interface with full logging and error handling.

✨ Features

• 🎨 Beautiful TUI — Colorized output with spinners, progress bars, and ASCII-bordered sections
• 🔍 Auto OS Detection — Detects Debian 10–13 and Ubuntu 18–24 automatically; exits gracefully on unsupported systems
• 🔐 Smart Privilege Handling — Works as root or detects sudo availability automatically
• 📦 System Update — Shows full list of upgradable packages (name → new_version), runs upgrade, dist-upgrade, autoremove, autoclean with live progress
• 🌍 Timezone Configuration — Interactive menu with common zones, custom input, and full Debian-specific handling
• 🕐 NTP Synchronization — Enables and verifies systemd-timesyncd with real-time sync confirmation
• 📝 Full Logging — Every action logged to /var/log/system-maintenance.log with timestamps
• 💾 Config Backups — Automatically backs up /etc/timezone and /etc/localtime before any changes
• 🔁 Reboot Prompt — Detects kernel updates and prompts for reboot if needed
• 🛡️ Error Handling — Uses set -euo pipefail + trap ERR for bulletproof execution

📋 Requirements

Missing dependencies (lsb-release, pv, systemd-timesyncd) are automatically installed by the script.

🚀 Usage

🚀 One-Line Download & Execute :

apt update && apt install -y curl && clear && \
curl -s https://docs.greenhome.stream/attachments/72 -o /tmp/timezone-setup.sh && \
bash /tmp/timezone-setup.sh

OR

1. Download and make executable

chmod +x system-maintenance.sh

2. Run as root or with sudo

# As root
./system-maintenance.sh

# As a sudo-capable user
sudo ./system-maintenance.sh

🔄 What the Script Does (Step by Step)

Step 1 — Privilege Check

Detects if running as root. If not, verifies sudo access before proceeding.

Step 2 — OS Detection

Reads /etc/os-release or uses lsb_release to identify the distro and version. Exits with a clear error message if the OS is unsupported.

Step 3 — Dependency Check

Silently refreshes the apt cache and installs any missing required packages (lsb-release, pv, systemd-timesyncd).

Step 4 — System Update (optional, prompted)

• Prompts: "Perform full system update? [Y/n]" (defaults to Yes after 30s)
• Displays a formatted list of all upgradable packages with version arrows (1.2.0 → 1.3.0)
• Detects kernel updates and flags for reboot
• Runs with live spinners: apt upgrade → dist-upgrade → autoremove → autoclean

Step 5 — Timezone Configuration (optional, prompted)

• Shows the current active timezone
• Prompts: "Set timezone? Default: Europe/Athens [Y/n]"
• Presents a menu of 9 common timezones + custom input option
• Validates the chosen timezone against /usr/share/zoneinfo/
• Backs up existing config before applying changes
• On Debian: additionally updates /etc/localtime symlink, writes /etc/timezone, and runs dpkg-reconfigure tzdata
• On Ubuntu: timedatectl set-timezone alone is sufficient
• Verifies the applied timezone matches the selection

Step 6 — NTP Synchronization (optional, prompted)

• Prompts: "Enable NTP sync with systemd-timesyncd? [Y/n]"
• Runs timedatectl set-ntp true
• Enables and starts systemd-timesyncd via systemctl
• Waits up to 15 seconds for sync confirmation with a live progress bar
• Displays service status and full timedatectl status output

Step 7 — Final Summary

Prints a formatted table with:

• Detected OS and version
• Active timezone
• NTP enabled/synchronized state
• Current date and time
• Log file path
• Reboot prompt if a kernel update was applied

📁 Log File

All actions are recorded in: /var/log/system-maintenance.log If the script lacks write permission to /var/log/, it falls back to: /tmp/system-maintenance.log

Log entries include timestamps and status for every operation performed.

🌍 Supported Timezones (Built-in Menu)

🐧 Compatibility Matrix

⚠️ Notes

• The script is idempotent — safe to run multiple times without side effects
• Config files are backed up with a timestamp suffix before any modification
• All prompts have a 30-second timeout that defaults to the safe/recommended option
• systemd-timesyncd and chrony should not run simultaneously; this script only manages timesyncd