安裝了win10，然后又安裝了manjaro，最后又安裝了Ubuntu。開機(jī)默認(rèn)就是進(jìn)入的Ubuntu的grub，然而我比較喜歡manjaro的grub主題。在bios中設(shè)置manjaro的引導(dǎo)為默認(rèn)引導(dǎo)，但是此時(shí)manjaro的grub沒有Ubuntu，進(jìn)入到manjaro系統(tǒng)，執(zhí)行如下命令即可：

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.

轉(zhuǎn)載于:https://www.cnblogs.com/feipeng8848/p/10735947.html

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