| Keith C. Perry via plug on 27 Jun 2020 17:56:00 -0700 |
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| Re: [PLUG] Grub |
Jeff, To fix boot issues, the best thing to do is to boot from a live cd or usb. From there you can mount the file system and chroot so you can fix it, for example... (Apologies... I'm doing this from memory since I can't find the last time I posted this on PLUG but this should get you started) This assumes, sda is the drive in question. Depending on how the live system boots it could be something else so do an "lsblk" or "blkid" to find the right disk... mount /dev/sda1 /mnt for dir in proc sys dev; do mount --bind /$dir /mnt/$dir; done chroot /mnt update-grub grub-install /dev/sda (I forget the exact parameter there for EFI but I've done this with DOS and EFI disk maps) exit The update-grub should find everything including your windows partitions and then grub-install will install the boot code. You can now reboot system. I haven't dual booted a system in a long time (and it wasn't using EFI) but I don't see why this wouldn't work. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Keith C. Perry, MS E.E. Managing Member, DAO Technologies LLC (O) +1.215.525.4165 x2033 (M) +1.215.432.5167 www.daotechnologies.com ----- Original Message ----- From: "jeffv via plug" <plug@lists.phillylinux.org> Cc: "Philadelphia Linux User's Group Discussion List" <plug@lists.phillylinux.org> Sent: Saturday, June 27, 2020 6:13:01 PM Subject: Re: [PLUG] Grub On June 27, 2020 8:52:45 AM EDT, Joe Rosato <rosatoj@gmail.com> wrote: >Have used this tool many times before to fix weird boot issues. > >https://www.howtogeek.com/114884/how-to-repair-grub2-when-ubuntu-wont-boot/ The boot mgr was on the first live disc, but I'll give this a shot. Thanks. I picked the wrong day to stop sniffing markers. >Also, if using EFI, try this boot manager. Just looks and reports back the >options out there.. less a repair and more a way to easily get into >anything EFI > >https://www.rodsbooks.com/refind/ >https://wiki.archlinux.org/index.php/REFInd > >That's my 10 cents! > >Joe > >On Fri, Jun 26, 2020, 9:58 PM jeffv via plug <plug@lists.phillylinux.org> >wrote: > >> Bit of a problem >> >> Sda: (dual boot) >> Sda1: tiny partition. Ntfs >> Sda2: win. Ntfs >> Sda3: lin. Ext4 >> >> Sdb Ext4, i think >> All Extended >> >> Sdb installed recently. When i removed it, I got the grub prompt. I sure >> didn't put boot files on it. >> >> After boot rescue i can get into win. There's a choice for lin but it goes >> right to grub. When i do 'ls', instead of the drives, i get a list of win >> files. >> >> I also tried rescatux, with no luck. When it tried to correct things there >> was an error installing grub, but i didn't have a need to know what it was. >> >> I've done all sorts of research, but it doesn't apply or work. It seems >> like it should be so easy, as there's a choice of which to boot. I have to >> hook sda3 to the lin side of the boot choice. It's just not working out or >> i goofed >> >> Ideas welcome. >> Thanks >> >> -- >> Sent from my non >> iDevice___________________________________________________________________________ >> Philadelphia Linux Users Group -- >> http://www.phillylinux.org >> Announcements - >> http://lists.phillylinux.org/mailman/listinfo/plug-announce >> General Discussion -- >> http://lists.phillylinux.org/mailman/listinfo/plug >> -- Sent from my non iDevice ___________________________________________________________________________ Philadelphia Linux Users Group -- http://www.phillylinux.org Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce General Discussion -- http://lists.phillylinux.org/mailman/listinfo/plug ___________________________________________________________________________ Philadelphia Linux Users Group -- http://www.phillylinux.org Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce General Discussion -- http://lists.phillylinux.org/mailman/listinfo/plug