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# Tested on RHEL 5, 6 & 7
# Sometimes it may be necessary to rebuild the initial ramdisk (also known as initrd or # initramfs) to include new kernel modules, files, etc. # RHEL 3, 4 & 5: Rebuilding the initrd # ------------------------------------------------------------------------------------------ cp /boot/initrd-$(uname -r).img /boot/initrd-$(uname -r).img.bak mkinitrd -f -v /boot/initrd-$(uname -r).img $(uname -r) # If we are in a kernel version different to the initrd we are building we must specify # the full kernel version, without architecture: mkinitrd -f -v /boot/initrd-2.6.18-348.2.1.el5.img 2.6.18-348.2.1.el5 # RHEL 6 & 7: Rebuilding the initramfs # ------------------------------------------------------------------------------------------ cp /boot/initramfs-$(uname -r).img /boot/initramfs-$(uname -r).img.bak dracut -f # If we are in a kernel version different to the initrd we are building we must specify # the full kernel version, including architecture: dracut -f /boot/initramfs-2.6.32-220.7.1.el6.x86_64.img 2.6.32-220.7.1.el6.x86_64 # *** Consider adding a new grub/grub2 entry pointing to the initial ramdisk image, that # will allow you to choose the old version at boot time without restoring the backup |