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--- ubuntu:network:error:could_not_resolve [2020/08/19 14:49] – created 192.168.1.1
+++ ubuntu:network:error:could_not_resolve [2021/01/07 11:05] (current) – removed peter
@@ Line 1: / Line 1: @@
-====== Ubuntu - Network - Error - Could not resolve ======
-If you get errors like this when you try to access something on the network, for instance when running "apt-get update":
-<code bash>
-Err http://security.ubuntu.com trusty-security InRelease
-Err http://security.ubuntu.com trusty-security Release.gpg
-  Could not resolve 'security.ubuntu.com'
-. . .
-</code>
-To fix, set your nameservers to outside nameservers.  This example uses Google's nameservers.  Open **/etc/network/interfaces** for editing:
-<code bash>
-sudo vi /etc/network/interfaces
-</code>
-Update the **dns-nameservers** line as shown:
-<file bash /etc/network/interfaces>
-. . .
-iface eth0 inet6 static
-        address 2604:A880:0800:0010:0000:0000:00B2:0001
-        netmask 64
-        gateway 2604:A880:0800:0010:0000:0000:0000:0001
-        autoconf 0
-        dns-nameservers 8.8.8.8 8.8.4.4
-</file>
-Refresh your network settings:
-<code bash>
-sudo ifdown eth0 && sudo ifup eth0
-</code>
-The expected output is:
-Output
-<code bash>
-RTNETLINK answers: No such process
-Waiting for DAD... Done
-</code>
-Next, create a new firewall rule to force IPv4 when it's available.  Create this new file:
-<code bash>
-sudo vi /etc/apt/apt.conf.d/99force-ipv4
-</code>
-Add this single line to the file:
-<file bash /etc/apt/apt.conf.d/99force-ipv4>
-Acquire::ForceIPv4 "true";
-</file>
-Save and close the file.  Now you should be able to use APT.