I accidentally modified NetworkManager with the command.
nmcli con modify eno1 ipv4.dns-options 'single-request-reopen timeout:2 ndots:0'
I think the modification hasn’t been activated since I haven’t restarted the device.
I don’t know the previous value of the setting.
How can I undo the modification to the previous one?
Set it to the empty string, which also happens to be the default.
# nmcli c m eno1 ipv4.dns-options ''
You will then see that the field has reverted to its default value.
# nmcli --fields ipv4.dns-options c s eno1 ipv4.dns-options: (default)
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