How to get eth0 and wlan0 back on Ubuntu Mate 18.04?

[Bo Berglund]

On Fri, 29 Jan 2021 16:39:39 +0100, Tom H <tomh0665 at gmail.com> wrote:

>On Wed, Jan 27, 2021 at 10:20 AM Bo Berglund <bo.berglund at gmail.com>
>wrote:
>>
>> I have a repurposed laptop running Ubuntu Mate 18.04.5 LTS and I
>> need to run a lot of scripts on this, but they fail because for
>> some reason eth0 and wlan0 are no longer available...
>>
>> How can I re-enable the use of these standard names instead of the
>> new strange names?
>>
>> I have searched the net and found some instructions here:
>> https://www.itzgeek.com/how-tos/mini-howtos/change-default-network-name-ens33-to-old-eth0-on-ubuntu-16-04.html
>>
>> But the first part of this instruction is not clear since it says
>> to "add" to /etc/default/grub like this:
>>
>>
>> Look for “GRUB_CMDLINE_LINUX”  and add the following”net.ifnames=0
>> biosdevname=0“.
>>
>> From:
>> GRUB_CMDLINE_LINUX=""
>> To:
>> GRUB_CMDLINE_LINUX="net.ifnames=0 biosdevname=0"
>>
>>
>> However, my existing entry is not empty, instead it has this:
>> GRUB_CMDLINE_LINUX="resume=UUID=<long guid string>"
>>
>> So how can I handle the rename of the network and still not destroy whatever the
>> existing entry is meant to do?
>
>GRUB_CMDLINE_LINUX="resume=UUID=<long guid string> net.ifnames=0 biosdevname=0"

Thanks a lot, I will try this.

Another follow-up question:
Do I have to reboot the laptop for it to take effect or is there some quicker
way to make it happen?
Since it is for GRUB I assume it needs a reboot operation, riht?


-- 
Bo Berglund
Developer in Sweden