DISCUSSION: HOWTO GRUB BOOTLOADER AND TROUBLE-SHOOTER

This thread is to discuss the article titled: HOWTO GRUB BOOTLOADER AND TROUBLE-SHOOTER

Mods

I had forgotten which version I had submitted for the answer section.

When you get a chance can you take a snapshot of this link as it has an expanded troubleshooter which is tooo large to have on the one posting.
http://www.linuxquestions.org/questi...hreadid=237511

Alternatively, as mods have better powers, can you make it one large post......I think I will hit the 25000 character limit wc?

So its http://www.linuxquestions.org/questi...hreadid=237511 with an embed of http://www.linuxquestions.org/questi...postid=1413211 at the section on trouble shooting?

Feel free to tell me the correct way to request an update please.

hello there aus9, you sound very clued up about the GRUB boot-loader. I have a question about it, i have a computer with Red Hat 9 on it, but no boot-loader, which my computer tech loaded for me. he has now left the company, and i do not have contact with him. the red hat computer has been switched off, and the tech did not leave the 'root' password. so my question is, am i able to loader grub onto the computer, through a floppy disk before the login page, as i can not get to the desktop. or do you know of any way that i could load the system, without wiping off the red hat that i have on at the moment?

see my reply on this thread please
http://www.linuxquestions.org/questi...hreadid=191173

systemrescue cd
for x86_64-efi usb
su as root or sudo
gdisk /dev/sdX (X from fdisk-l ) to make a gpt (many patition usb)
o
n
default (1)
default (start at begining)
+3G (large enough for systemrescuecd or more)
l (ef00)
x
e
w
mkfs.vfat -F 32 /dev/sdX (X from fdisk-l partition=1)(to format the new partition)
mkdir /mnt/my_usb (my_usb = any name)
mount /dev/sdX1 /mnt/my_usb (X from fdisk-l 1=partition)
download refind-bin zip
sudo ./refind-install --usedefault /dev/sdX1 --alldrivers (X from fdisk-l 1=partition)
grub-install --target=x86_64-efi /dev/sdX (X from fdisk-l 1=partition makes bootable may need --removable option )
(see further down for i386-pc grub.cfg menu)
e2lable, tune2fs -L, ntfslabel, mkfs -L gparted to label (your_label_name) /dev/sdX (X from fdisk-l 1=partition to add in /mnt/my_usb/EFI/boot/refind.conf)
blkid to get UUID or PARTUUID of /dev/sdX (to add in /mnt/my_usb/EFI/boot/refind.conf)
menuentry "Sysrescucd" {
icon /EFI/refind/icons/os_arch.png
# volume "sysrsccd"
loader /EFI/boot/sysresccd/boot/x86_64/vmlinuz
initr /EFI/boot/sysresccd/boot/x86_64/sysresccd.img
options "root=(from blkid) archisobasedir=/EFI/boot/sysresccd archisolabel=(your_label_name) copytoram "
# submenuentry "Boot using fallback initramfs" {
# initrd /boot/initramfs-linux-fallback.img
# }
# submenuentry "Boot to terminal" {
# add_options "systemd.unit=multi-user.target"
# }
# disabled
}
download systemrescuecd iso
mkdir /mnt/iso
mount -o loop systemrescue-11.00-amd64.iso /mnt/iso (iso = any name)
copy /mnt/iso/systemresccd to /mnt/my_usb/EFI/boot
for i386-pc grub.cfg
fdisk /dev/sdX (X from fdisk-l to make a msdos usb)
o (make msdos )
n
p
1 (default
n
default (1)
default (start at begining)
+3G (large enough for systemrescuecd or more)
t 83
mkfs.ext4 or what want on umount /dev/sdX (X from fdisk-l to format partition)
e2lable, tune2fs -L, ntfslabel, mkfs -L gparted to label (your_label_name) /dev/sdX1 (your_lable_name=any name X from fdisk-l to label partition )
mkdir /mnt/my_usb (my_usb = any name)
mount /dev/sdX1 /mnt/my_usb (X from fdisk-l 1=partition)
download systemrescuecd iso
mkdir /mnt/iso
mount -o loop /mnt/iso (iso = any name)
mkdir /mnt/my_usb/boot
mount /dev/sdX1 /mnt/my_usb (my_usb= any name X from fdisk-l 1=partition)
mkdir /mnt/my_usb/boot
download systemrescuecd iso
mkdir /mnt/iso
mount -o loop systemrescue-11.00-amd64.iso /mnt/iso (iso = any name)
copy /mnt/iso/systemresccd to /mnt/my_usb//boot
grub-mkconfig -o /mnt/my_usb/boot/grub/grub.cfg
grub-install --target=i386-pc --boot-directory=/mnt/my_usb/boot --recheck --no-floppy --force /dev/sdX (my_usb = any name X from fdisk-l 1=partition may need --removable option)
this makes grub-install reinstall not possble? can wipe usb with dd and start fresh
e2lable, tune2fs -L, ntfslabel, mkfs -L gparted to label (your_label_name) /dev/sdX (X from fdisk-l 1=partition toadd in /mnt/my_usb/boot/grub/grub.cfg)
menuentry 'sysrecuecd on sda1' {
load\_video
set gfxpayload=keep
insmod gzio
insmod part\_msdos
insmod lvm
insmod ext2
set root='hd0,msdos1'
echo 'Loading Linux linuxv ...'
linux /boot/sysresccd/boot/x86\_64/vmlinuz archisobasedir=/boot/sysresccd archisolabel=(your\_label\_name) copytoram iomem=relaxed
initrd /sysresccd/boot/x86\_64/sysresccd.img
}
if want add menu.lst & grldr(grub4dos) & bootlace.com to /mnt/my_usb to do bootlace.com /dev/sdX (X from fdisk-l 1=partition)
menuentry "boot grldr or ntldr " {
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
insmod ntldr
ntldr /grldr
}

Originally Posted by visigal@gmail.com systemrescue cd for x86_64-efi usb su as root or sudo gdisk /dev/sdX (X from fdisk-l ) o n default (1) default (start at begining) +3G (large enough for systemrescuecd or more) l (ef00) x e w mkfs.vfat -F 32 /dev/sdX (X from fdisk-l partition=1) mkdir /mnt/my_usb (my_usb = any name) mount /dev/sdX1 /mnt/my_usb (X from fdisk-l 1=partition) download refind-bin zip sudo ./refind-install --usedefault /dev/sdb1 --alldrivers grub-install --target=x86_64-efi --removable /dev/sdX (X from fdisk-l 1=partition makes bootable) for refind.conf step furter down (see further down for i386-pc grub.cfg menu) mkdir /mnt/my_usb (my_usb = any name) mount /dev/sdX1 /mnt/my_usb (X from fdisk-l 1=partition) for me mount /dev/sdb1 /mnt/my_usb in /mnt/my_usb/EFI/boot/refind.conf e2lable, tune2fs -L, ntfslabel, mkfs -L gparted to label (your_label_name) usb /dev/sdX (X from fdisk-l 1=partition) blkid to get UUID or PARTUUID to add to add in /mnt/my_usb/EFI/boot/refind.conf menuentry "Sysrescucd" { icon /EFI/refind/icons/os_arch.png # volume "sysrsccd" loader /EFI/boot/sysresccd/boot/x86_64/vmlinuz initr /EFI/boot/sysresccd/boot/x86_64/sysresccd.img options "root=(from blkid) archisobasedir=/EFI/boot/sysresccd archisolabel=(your_label_name) copytoram " # submenuentry "Boot using fallback initramfs" { # initrd /boot/initramfs-linux-fallback.img # } # submenuentry "Boot to terminal" { # add_options "systemd.unit=multi-user.target" # } # disabled } download systemrescuecd iso mkdir /mnt/iso mount -o loop systemrescue-11.00-amd64.iso /mnt/iso (iso = any name) copy /mnt/iso/systemresccd to /mnt/my_usb/EFI/boot for i386-pc grub.cfg if not already fdisk /dev/sdX (X from fdisk-l ) o (make msdos ) n p 1 (default n default (1) default (start at begining) +3G (large enough for systemrescuecd or more) t 83 fdisk /dev/sdX (X from fdisk-l ) mkfs.ext4 or what want on umount /dev/sdX e2lable, tune2fs -L, ntfslabel, mkfs -L gparted to label (your_label_name) usb (/dev/sdb1) mkdir /mnt/my_usb (my_usb = any name) mount /dev/sdX1 /mnt/my_usb (X from fdisk-l 1=partition) for me mount /dev/sdb1 /mnt/my_usb download systemrescuecd iso mkdir /mnt/iso mount -o loop /mnt/iso (iso = any name) mount /dev/sdX1 /mnt/my_usb (my_usb= any name X from fdisk-l 1=partition) mkdir /mnt/my_usb/boot download systemrescuecd iso mkdir /mnt/iso mount -o loop systemrescue-11.00-amd64.iso /mnt/iso (iso = any name) copy /mnt/iso/systemresccd to /mnt/my_usb//boot grub-install --target=i386-pc --boot-directory=/mnt/my_usb/ --recheck --no-floppy --force /dev/sdX (my_usb = any name X from fdisk-l 1=partition) grub-install --target=i386-pc --removable /dev/sdb (makes bootable) grub-mkconfig -o /mnt/my_usb/grub/grub.cfg e2lable, tune2fs -L, ntfslabel, mkfs -L gparted to label (your_label_name) usb /dev/sdX (X from fdisk-l 1=partition) blkid to get UUID or PARTUUID to add to add in /mnt/my_usb/grub/ add to grub.cfg menuentry 'sysrecuecd on sda1' { load\_video set gfxpayload=keep insmod gzio insmod part\_msdos insmod lvm insmod ext2 set root='hd0,msdos1' echo 'Loading Linux linuxv ...' linux /boot/sysresccd/boot/x86\_64/vmlinuz archisobasedir=/boot/sysresccd archisolabel=(your\_label\_name) copytoram iomem=relaxed initrd /sysresccd/boot/x86\_64/sysresccd.img

Is there an actual point to this?? You re-opened a thread that had been closed for *NINETEEN YEARS*, and posted something with zero explanation of what the commands do, single-letters in some cases, with paths that may or may not matter to others. Blindly following anything you've posted here may totally WIPE someone elses system.

Originally Posted by TB0ne Is there an actual point to this?? You re-opened a thread that had been closed for *NINETEEN YEARS*, and posted something with zero explanation of what the commands do, single-letters in some cases, with paths that may or may not matter to others. Blindly following anything you've posted here may totally WIPE someone elses system.

poster is just a spammer.