How to check whether linux supports ipv6
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There are two ways to view it: 1. Execute the "ifconfig" command to display the IP address, view the output information, and support ipv6 if it contains "inet6" information. 2. Execute the "netstat-tuln" command to detect the IP monitored by the service. If the output contains "tcp6" information, then ipv6 is supported.
The operating environment of this tutorial: linux5.9.8 system, Dell G3 computer.
Check whether the linux server supports ipv6
Method 1: use the ifconfig command to check whether your IP address contains an IPv6 address
If the output has the line "inet6" indicating that ipv6 is supported, if ipv6 is not supported, the output will not have "inet6".
Method 2: use the netstat-tuln command to check whether there is an address in IPv6 format in the IP that the service is listening to.
Ipv6 is supported if the output contains "tcp6" information.
Expand knowledge: how to turn on IPV6
1 、 vim / etc/sysctl.conf
Change the following value to 0. If not, add it.
Net.ipv6.conf.all.disable_ipv6 = 0
Net.ipv6.conf.default.disable_ipv6= 0
Net.ipv6.conf.lo.disable_ipv6 = 0
2 、 vim / etc/modprobe.d/disable_ipv6.conf
Change the following value to 0. If not, add it.
Options ipv6 disable= 0
3 、 vim / etc/sysconfig/network
Modify the following values yes. If not, you can add them.
NETWORKING IPV6=yes
So far, the server-side support for ipv6 has been modified.
4. Restart the server to test whether ipv6 is supported.
Restart command:
Service network restart
After rebooting, ifconfig looks at the information about ipv6 and sees the output about ipv6.
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