OneDNS

Smart DNS Switcher for Linux with Backup and Restore
Written in pure Bash — minimal, fast, and efficient.

🚀 About

OneDNS is a lightweight command-line tool for managing DNS settings on Linux systems.
It allows you to switch DNS providers with one click, reset to default, and safely restore your original settings from backup.

🔧 Features

• ✅ System-wide installation or live usage (no install needed)
• ✅ Switch between trusted DNS providers (403, Electro, Shecan)
• ✅ Reset to Google DNS (8.8.8.8)
• ✅ Automatic backup of original /etc/resolv.conf
• ✅ Easy restore of backup anytime
• ✅ Clean uninstallation option
• 🛑 "Filter check" feature is present in code (commented out for now)

📦 Installation

Live mode (no installation):

sudo bash onedns.sh

Install system-wide:

When prompted, select:

[1] Install (system-wide)

Then use it from anywhere with:

sudo onedns

💻 Usage

You’ll see a menu like this:

[1] Start DNS Options
[2] Reset DNS (8.8.8.8)
[5] About
[6] Show Current DNS
[7] Restore Original DNS from Backup
[9] Uninstall OneDNS
[00] Exit

DNS Options:

• 403 Online → 10.202.10.202, 10.202.10.102
• Electro → DNS optimized for unlocking YouTube
• Shecan → Reliable Iranian DNS provider

🧠 Backup & Restore

The script creates a one-time backup of /etc/resolv.conf when you first change the DNS.
To restore it at any time, select:

[7] Restore Original DNS from Backup

🧹 Uninstalling

You can completely remove OneDNS and its backup using:

sudo onedns
# Then select option [9] Uninstall

📝 License

This project is licensed under the GNU General Public License v3.0.
See the LICENSE file for details.

👨‍💻 Author

Made with ❤️ by @BDadmehr0

If you find this tool useful, feel free to star 🌟 the repo and share it with others!