Quelle und Artikel: askubuntu.comType sudo efibootmgr to list all the entries in Boot Menu. If the command doesn't exist, then do sudo apt install efibootmgr.
Find Ubuntu in the menu and note down its boot number e.g. 1 in Boot0001
Type sudo efibootmgr -b <boot number> -B to delete the entry from Boot Menu. E.g. sudo efibootmgr -b 1 -B -b: modify boot number -B: delete boot number
Eigenes Beispiel, zum löschen des Eintrags Boot0012
Code: Alles auswählen
sudo efibootmgr -b 12 -B