On 06/14/2010 02:13 PM, Wendy William wrote: > Dear, > > I try to reinstall kernel-xen by doing: > # yum erase kernel-xen > > But, after reboot CentOS can't start because lost kernel-xen > > Please advise how to repair and install kernel-xen again. If you boot from the CentOS media and select "repair" you should be placed at a prompt with the root filesystem mounted under a subdirectory ( I forget the path). Once you've identified where that is you can copy the kernel rpm there or perhaps the tmp directory under there. Then you do a chroot to the mount point before doing an "rpm -i" of the kernel rpm. Then remove the rpm. Check that the /boot/grub/grub.conf file looks right and that the vmlinu[x,z] file is in /boot. Then write yourself a note telling yourself not to do that again. :-) Brett