給GRUB添加新的項目

安裝了win10，而後又安裝了manjaro，最後又安裝了Ubuntu。開機默認就是進入的Ubuntu的grub，然而我比較喜歡manjaro的grub主題。在bios中設置manjaro的引導爲默認引導，可是此時manjaro的grub沒有Ubuntu，進入到manjaro系統，執行以下命令便可：

sudo update-grub

原文：https://askubuntu.com/questions/649816/add-new-menu-items-to-grub-boot-menu

Grub menu entries are auto-generated by sudo update-grub. Have you tried to run it ? Doesn't it suite your needs ?

Otherwise, you can use /etc/grub.d/40_custom to add your custom entries. And then run sudo update-grub to update /boot/grub/grub.cfg.

You can however edit manually /boot/grub/grub.cfg to delete an entry. But your change will be lost the next time update-grub will be run by you or automatically by ubuntu when there is a kernel upgrade.