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How do I know if I have IPv4 or IPv6 Linux?
Using the ifconfig Command The system will display all network connections – including connected, disconnected, and virtual. Look for the one labeled UP, BROADCAST, RUNNING, MULTICAST to find your IP address. This lists both IPv4 and IPv6 addresses.
How do I know if IPv6 is enabled Ubuntu?
How To Test Linux Operating System for IPv6 Networking Support
- Task: Check for IPv6 support in the current running kernel. To check, whether your current running kernel supports IPv6, take a look into your /proc-file-system.
- IPv6 protocol stack for Linux via ipv6 module – Turn on IPv6 Support.
- Further readings:
Is there a way to disable IPv6 in Fedora?
As of December 2014, the percentage of users reaching Google services with IPv6 surpassed 5% for the first time. So, one wants to disable IPv6 in their Fedora based distributions of Linux because they are of no use currently. So, here are the steps by which we can easily disable IPv6 networking in our machine.
How to check if IPv6 is disabled in Linux?
Assuming if you have disabled IPv6 using kernel boot entries or GRUB2 then it is possible you will get empty output of most commands. This would mean that IPv6 module itself is unloaded in the kernel hence it is in disabled state. You can check the content of /sys/module/ipv6/parameters/disable file to get the IPv6 status on the Linux server.
How can I check if service is using IPv6 socket?
You can look out for any service which is using IPv6 socket on tcp6 or udp6, one of the method to check this is using netstat command. ss is another utility to investigate sockets. It is an alternative to netstat command and it can display more TCP and state information than other tools.
Where does the IPv6 address go in Linux?
By default a IPv6 address will be assigned to every available interface in Linux. Even if you do not have an IPv6 configuration, each interface will get a global address, eg: 2001::1/64 or a link-local address fe80::x/64.