The Dock - Love it or hate it, it’s an integral part of OS X - make the most of it!Ħ. The Finder - The secrets to making the most of the new Finderĥ. General Hints and Tricks - Non-program-specific suggestions and hintsĤ. OS X Overview - A high-level view of the structure and features of OS Xģ. Introduction - Background on the guide and the authorĢ. The Mac OS X Solutions Guidebook Version 1.1 – December 9, 2001ġ. If it does not, you got your partitions wrong.The Mac OS X Solutions Guidebook Advice, hints, and how-to's for Apple’s new operating system Pressing enter should lead you back into Ubuntu. Replate (hd0,msdos6) with the typical root parition, you should find bin/ boot/ home/ etc/ in here.Replace (hd0,msdos1) with where vmlinuz and initrd are.After typing vmlinuz you can press tab for autocomplete.Linux (hd0,msdos1)/vmlinuz root=(hd0,msdos6) (hd 1,msdos4) corrisponds to /dev/sd b4 set root = (hd0,msdos6) If you "ls" in the boot folder and it's empty, you will have to look for vmlinuz somewhere on another partition. There will be one partition (root) you find with bin/ and boot/ etc in. This could be in the same partition as root or (not in my case). ├─sda3 8:3 0 28G 0 part / <- because this is under sdaĪt this point, GRUB bootloader should work as you intend so.Īfter spending a while on this page, here is what worked for me:Ĭheck each of the partitions until you find one with vmlinuz and initrd on. Sda 8:0 0 223.6G 0 disk <- in my case, sdX = sda If not sure, issue lsblk and look for the device which has / mountpoint: $ lsblk Reinstall grub 2.1 Make sure `grub-install` is there: sudo apt-get install grub-installĢ.2 Reinstall grub for the mounted disk: sudo grub-install /dev/sdX if theres multiple versions, use whateverġ.3 Load a linux initrd file: grub> initrd /boot/initrd.img- # same deal, use TAB to autocomplete versionĢ. If there's no vmlinuz file, call unset root and try with another one set root=(hd0,gpt2) 1.2 Load a linux kernel: grub> linux /boot/vmlinuz- # use TAB to autocomplete version. Ls /boot # if theres a file called vmlinuz or initrd, bingo! (hd0,gpt1), (hd0,gpt2) # you might have other things listed here Start your system 1.1 Figure out which partition is the system one via mounting available partitions and looking for executable kernel file: grub> ls # shows list of disks and partitions available Please look at the "Boot-Repair"-tool from this article: (I had positive experiences with it, when previous steps wouldn't survive the reboot) If NOT - you have to go through the steps again an might have to repair or install grub again: this should correct the missing information and it should boot next time. start a "terminal") now, and execute: sudo update-grub or (if grub is in a sub-directory): set prefix=(hd0,1)/boot/grub Now you have to set the boot parameters accordingly - just type the following (with the correct numbers for your case) and after each line press return: set prefix=(hd0,1)/grub or, in case of "UEFI", it look something like: (hd0,1)/efi/boot/grub OR (hd0,1)/efi/grub and so on, until you find: (hd0,1)/boot/grub OR (hd0,1)/grub Then you have to go through each, type something like (depends what is shown by the ls command): ls (hd0,1)/ I think you have to look at something like this article: how-rescue-non-booting-grub-2-linux The boot process can't find the root partition (the part of the disk, that contains the information for starting up the system), so you have to specify its location yourself. Maybe this additional bit of information can help figure out what is going on? I checked with the blkid command and that is the identifier of my linux partition. This did not fix the problem, but now when it starts in command prompt mode, GRUB shows the following message: error: no such device: 6fxxxxx-xxxx-xxxx-xxxx-xxxxxee. Why is this happening and how can I ensure that GRUB always loads the menu? EditĪs suggested in the comments, I tried purging the grub-efi package and reinstalling it. I think that the BIOS has EFI enabled, and I installed the GRUB bootloader in /dev/sda. Rebooting without pressing F12 always reboots in command line mode. Using this technique, it always loads the menu. What works is to reboot using Ctrl+Alt+Del, then pressing F12 repeatedly until the normal GRUB menu appears. There is probably a command that I can type to boot from that prompt, but I don't know it. When I turn on the computer, the normal GRUB menu appears most of the time:īut after booting either Linux or Windows then rebooting, I GRUB starts in command line mode, as seen in the following screenshot: I installed Linux Mint on my laptop along with a pre-installed Windows 10.
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