https://community.hpe.com/t5/operating-system-linux/recover-the-system/m-p/3657250#M20296 This is a hard one. How did you upgraded the kernel? If you did it right, you should still have the other kernel as an boot option. If you don't have the boot option, but you still have the old kernel, you can boot with the installation cd and start in rescue mode. From there, you can add the boot option to the /etc/grub.conf file.<BR /><BR />If you don't have the old kernel, you can boot using the installation cd in rescue mode and re-install the old kernel using rpm -ivh. Tue, 25 Oct 2005 13:10:56 GMT Ivan Ferreira 2005-10-25T13:10:56Z https://community.hpe.com/t5/operating-system-linux/recover-the-system/m-p/3657249#M20295 I hv just upgrade the RH linux kernel , but can't boot again ( it seems can't recognise the hardware ) , if I don't create the rescue disk in advance , how can I recover it ? thx in advance. Tue, 25 Oct 2005 13:02:49 GMT https://community.hpe.com/t5/operating-system-linux/recover-the-system/m-p/3657249#M20295 addendum 2005-10-25T13:02:49Z https://community.hpe.com/t5/operating-system-linux/recover-the-system/m-p/3657250#M20296 This is a hard one. How did you upgraded the kernel? If you did it right, you should still have the other kernel as an boot option. If you don't have the boot option, but you still have the old kernel, you can boot with the installation cd and start in rescue mode. From there, you can add the boot option to the /etc/grub.conf file.<BR /><BR />If you don't have the old kernel, you can boot using the installation cd in rescue mode and re-install the old kernel using rpm -ivh. Tue, 25 Oct 2005 13:10:56 GMT https://community.hpe.com/t5/operating-system-linux/recover-the-system/m-p/3657250#M20296 Ivan Ferreira 2005-10-25T13:10:56Z