The person who started this thread wants to do a similar thing. You can learn from the mistakes of others. Note the information provided by efflandt in post #7
You will need to make the edits using a text editor that has been loaded with administrator privileges. When I edit system configuration files I use Gedit and I start it with this command
We can load Gedit and load a document at the same time with something like this.
You will need to add the lines
sudo -H gedit /etc/default/grub
the # symbol tells grub to ignore that instruction
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
and then run