Editing grub boot menu, how to save?

[g.lip at gmx.com]

>editing files from the "essential" package "base-files" to get
>permanent distinguishable bootloader menu entries is a poor advice.
>It's even more worse to recommend it to a user who needs much support
>from communities and soon or later likely needs to post the original
>output of lsb_release to get adequate help.


It worked for me. Tried it after you posted above.

From...
menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-6cdbf678-8ea0-4224-b2db-53c1d7450fff' {


To.....
menuentry 'Ubuntu-Osssid GNU/Linux' --class ubuntu_osssid --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-6cdbf678-8ea0-4224-b2db-53c1d7450fff' {

The change effected in /etc/os-prober
pop at Aug:~$ cat /etc/os-release
PRETTY_NAME="Ubuntu-OS-rel 21.10"
NAME="Ubuntu -OS - notnice"
VERSION_ID="21.10"
VERSION="21.10 (Impish Indri)"
VERSION_CODENAME=impish
ID=ubuntu-OSSSID
ID_LIKE=debian
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
UBUNTU_CODENAME=impish


But, if you think new linux users should not try changing anything, glad I heard your advice only now.
Else I'd remain a new linux user.