Fedora18 upgrade

(1)use fedup network upgrade fedora18 

#yum install fedup

#fedup-cli --network 18 --debuglog fedupdebug.log

#reboot  

(2)software update

#yum clean all

#yum update -y

#yum upgrade -y

#reboot 

(3)old kernel(Fedora17 & Fedora18) delete

# yum install yum-utils

# package-cleanup --oldkernels