How to disable IPv6 on a Linux device?

This guide will show you how to disable IPv6 on a Linux operating system.

1. Open the Terminal using the Ctrl+Alt+T keyboard shortcut. On the Terminal window, enter the following command:
   
   sudo nano /etc/sysctl.conf
   
   
   
   This command will open the sysctl.conf file in the Terminal.
   
   
2. Scroll down to the bottom of the sysctl.conf file and paste these lines.
   

   net.ipv6.conf.all.disable_ipv6 = 1
   net.ipv6.conf.default.disable_ipv6 = 1
   net.ipv6.conf.lo.disable_ipv6 = 1
   net.ipv6.conf.tun0.disable_ipv6 = 1

   
   
   
   Save the changes by pressing Ctrl+O and Ctrl+X after that.
   
   
3. Enter sudo sysctl -p to apply the changes in the sysctl.conf file.
   
   
   
   
4. Check the status of IPv6 by entering the following command in the Terminal:
   
   sudo cat /proc/sys/net/ipv6/conf/all/disable_ipv6
   
   If you see 1 as a reply, it means IPv6 is not running on your device anymore.
   
   
   
   

Congratulations! You have learned how to disable IPv6 on your Linux device!

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