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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