Hey there! As someone who’s walked dozens of Ubuntu parents through setting up safe, kid-friendly environments, I’m here to share the best GUI-focused tools and actionable tips to keep your little ones protected online—without the hassle of complex command-line setups.

一、Top User-Friendly GUI Parental Control Tools #

1. GNOME Parental Controls (Built-In, No Extra Installation) #

Since most Ubuntu desktops use GNOME, this is your first stop—it’s pre-installed, intuitive, and covers all core needs:

• How to set it up:
  1. Open Settings (click the top-right system menu → Settings).
  2. Go to the Users tab.
  3. Select your child’s standard user account (always create a separate standard account for kids—never let them use admin access!).
  4. Toggle on Parental Controls.
• Key features you can configure:
  • Screen Time Management: Set daily time limits (e.g., 2 hours on school days) and specific allowed hours (e.g., 3 PM to 5 PM after homework).
  • Application Restrictions: Choose which apps your child can launch—tick "Only allow selected apps" and pick educational tools like LibreOffice, GIMP, or approved games.
  • Web Filtering: Use the pre-built "Child-safe browsing" mode, or manually add allowed/blocked websites (great for whitelisting school portals).
  • Activity Reports: Check a log of apps used and websites visited to adjust rules as needed.

2. Timekpr-nExT (Advanced Screen Time & Locking) #

If you want more granular control over screen time (like forced bedtime locks), Timekpr-nExT is a fantastic GUI tool:

• Installation: Open the terminal and run:

  sudo apt update && sudo apt install timekpr-next
  

• Setup steps:
  1. Launch the Timekpr-nExT app from your applications menu.
  2. Select your child’s account from the dropdown.
  3. Configure daily time limits, weekend vs. weekday rules, and "hard lock" times (e.g., automatically lock the account at 9 PM every school night).
  4. You can also set a grace period for saving work before the lock kicks in.

3. OpenDNS FamilyShield (Network-Level Web Filtering) #

While it’s not a standalone GUI app, you can configure it through Ubuntu’s network settings to block adult content, phishing sites, and malware across all devices on your network:

• Setup:
  1. Open Settings → Network.
  2. Click the gear icon next to your active Wi-Fi/Ethernet connection.
  3. Go to the IPv4 tab.
  4. Under "DNS", switch from "Automatic" to "Manual", then add these addresses:
     • 208.67.222.123
     • 208.67.220.123
  5. Click "Apply"—now all web traffic from your child’s Ubuntu account will be filtered automatically.

二、Practical Configuration Tips for Maximum Safety #

• Start with a dedicated child account: Always create a standard (non-admin) account for your kids. This prevents them from modifying parental control settings, installing unapproved apps, or making system changes.
• Test your rules: Log into your child’s account and verify that blocked apps/websites are inaccessible, and screen time limits trigger the lock as expected. It’s easy to miss a setting—better to catch it early!
• Balance control with flexibility: Don’t block everything—allow age-appropriate educational tools and creative apps (like Scratch for coding). For older kids, consider adding a "free time" window where restrictions are relaxed.
• Review activity reports regularly: Most tools log app usage and web activity. Use this to spot any red flags (e.g., excessive social media use) and adjust rules accordingly.
• Communicate with your kids: Explain why you’re setting these limits—frame it as keeping them safe, not punishing them. Involve them in setting reasonable rules (like "30 minutes of games after homework") to build trust.
• Keep Ubuntu updated: Make sure your system and parental control tools are always up to date—updates often include security patches that close loopholes.

备注：内容来源于stack exchange，提问作者Wali Haider