How to disable IPv6 on Linux?
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    How to disable IPv6 on Linux?

      Article summary

      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.

      1. 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.

      1. Enter sudo sysctl -p to apply the changes in the sysctl.conf file.

      2. 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.

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