index=0 kernel=/boot/vmlinuz-3.10.0-229.4.2.el7.x86_64 args="ro lv=rhel/root crashkernel=auto lv=rhel/swap vconsole.font=latarcyrheb-sun16 vconsole.keymap=us rhgb quiet LANG=en_US.
UTF-8" root=/dev/mapper/rhel-root initrd=/boot/initramfs-3.10.0-229.4.2.el7.x86_64title=Red Hat Enterprise Linux Server (3.10.0-229.4.2.el7.x86_64) 7.0 (Maipo) This command removes the Red Hat graphical boot argument, enables boot message to be seen, and adds a serial console.
To achieve this, you can use a Live CD, mount the relevant partitions from your hard disk, chroot into the mounted directory, and run update-grub, which should work as if you were operating on the actual hard disk.Boot with your Live CD, selecting "Try Ubuntu without installing".Let me know if you need help to do this: and check that grub's files are there, there should be a bunch of files and grub.cfg, the latter should have entries for your Ubuntu kernels. It reinstalls Grub, but when I reboot it still hasn't been updated, so my Ubuntu installation still doesn't show up in Grub.If you only see and no files, it means that this is NOT the correct boot directory, look above for how to mount a separate boot partition. Somehow I need to update Grub before I reboot, like from the Live CD. However, in the end nothing seemed to work, and since I had a separate /home partition, I was able to reinstall Ubuntu without losing any data.Ok, I went and looked, and there were 50 or so updates already downloaded and ready to install. Ok, so I booted the open Su SE Live USB stick again, repaired GRUB, booted open Su SE from the hard drive, and all was well.
I let it do the installation, then rebooted "to finish the Windows update installation". Something that Windows Update had done had scribbled on the Master Boot Record (MBR), and it just kept cycling through the HP splash screen. There were no complaints from Windows Update, of course, nothing that it said "failed", and no warnings about modifying the MBR. I then booted Windows 7 again, and it went through "Installing Updates Phase 3...". Windows then informed me that it had another "Important Update" to install, so I let it do that, rebooted, and it seemed ok. of course, it slogged around for an hour or so downloading and trying to install the update(s), before it finally informed me that the installation had failed, please reboot. I tried to reboot, and Windows Update had scribbled on the MBR again. Boot open Su SE Live USB, repair GRUB, boot open Su SE from disk, all is well. Has Microsoft simply decided that they won't tolerate GRUB, or anything other than their own crummy bootloader?
As the console arguments will be added at the end of the line, the new console will take precedence over any other consoles configured.
I was trying to clean up my Grub entries, and accidentally removed all of my Linux kernels from Grub (they're still on the hard drive).
# updatedefault=true # updatedefault=false This option controls if grub should update the default entry to keep booting the same kernel even if a new one is installed.
The update-grub script can be ran automagically from the grub(8), grub-install(8), kernel-img.conf(5) (contained in the kernel- package package), bootparam(7).
This new HP came with Windows 7 Home Premium, so that should fit the bill nicely.