You have to boot from a live boot disk, chroot into your old system's filesystem, mount all partitions properly and then download and rebuild the kernel and grub config. You can try just "yum install kernel" aswell, but I'm not sure whether it'd work. Best regards, -- Sander Kuusemets On 11/20/2015 03:25 PM, Siva Prasad Nath wrote: > I can boot from DVD. I deleted kernel. Thought it will fix the problem. Now > I can see rescue menu only. > Kernel source is there. How to get back kernel. > > On Friday, November 20, 2015, Arun Khan <knura9 at gmail.com> wrote: > >> On Fri, Nov 20, 2015 at 2:18 PM, Siva Prasad Nath >> <shivaprasadnath21 at gmail.com <javascript:;>> wrote: >>> Hi, >>> My server not able to boot up. It is hanging after few times. >>> How to repair boot system? I am trying to use grub2-install. Is it >>> necessary to install grub2 on boot device? >>> >> Does the system boot with a Live USB system? >> >> -- Arun Khan >> _______________________________________________ >> CentOS mailing list >> CentOS at centos.org <javascript:;> >> https://lists.centos.org/mailman/listinfo/centos >> >