The automatic recovery method after Ubuntu system modifying DNS and restarting

Problem Phenomenon:

After the Virtual Machines in the ubuntu system modifying the DNS information in the resolv.conf and restarting, the information in resolv.conf will revert to the pre-modified information;

Problem Causes:

As shown below, /etc/resolv.conf in the ubuntu system is actually a soft link of /run/resolvconf/resolv.conf;

Solution:

You can directly modify the DNS information in the /run/resolvconf/resolv.conf;

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