I tried today to update my kernel so i tried to use yum command:
[root@server ~]# yum list kernel
Loading "installonlyn" plugin
Setting up repositories
Reading repository metadata in from local files
Excluding Packages in global exclude list
kernel.i586 2.6.18-1.2798.fc6 installed
kernel.i586 184.108.40.206-61.fc6 updates
kernel.i686 220.127.116.11-61.fc6 updates
after that I rebooted the server and it gone down.
i asked my datacenter to reboot my server and they told me the O/S is having a problem with kernel panic.
i told them to check grub.conf and try to boot again from the old kernel, and they successed this time.
and they told me: Right now the server is booting off the older kernel. The new kernel panics because it can't find any partitions.
# grub.conf generated by anaconda
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
# root (hd0,0)
# kernel /vmlinuz-version ro root=/dev/VolGroup00/LogVol00
# initrd /initrd-version.img
title Fedora Core (18.104.22.168-61.fc6)
kernel /vmlinuz-22.214.171.124-61.fc6 ro root=/dev/mapper/VolGroup00-LogVo$
title Fedora Core (2.6.18-1.2798.fc6)
anyone could advice me how can finish the kernel updates because really I'm still new to linux.