a Prob. with yum update
 

hi all this afternoon i did a "yum update " FC4 from livina all went fine UNTILL i rebooted
it seams that selinux has locked me out root dose not have permision to load the gnome or wright to logfiles . opon rebooting with disk 1 and entering "rescue " root pass is invallad but the user account and pass work running su from user reports pass for root is invalid .

it apares that there might be a prob. with livia

What did you update? What are the last things in your /var/log/yum.log?

selinux can be disabled at boot,
Add selinux=0 to your kernel command line.

eg highlight the kernel you wish to boot in grub and press "e" then select the second line down and press "e" then go to the end of the line and add " selinux=0" and press return then press "b"

you could also try booting into single user mode as well by using the word single instead of selinux=0, then just type passwd to reset your root password then reboot.

if that works i suggest you run system-config-securitylevel to sort out your selinux settings

hope this helps