>>http://docs.fedoraproject.org/yum/en/
>>===Update CentOS===
on centos 4 & 5 you will now need to use rpm to import the rpm gpg key before up2date or yum will work

==rpm import==
%%
# mount /dev/cdrom /media/cdrom
# cd /media/cdrom
# rpm --import RPM-GPG-KEY-centos4
OR
# rpm --import RPM-GPG-KEY-CentOS-5
# cd
# eject
%%

==Centos 4 update using up2date==
%%
# up2date -u
%%

==Centos 4 & 5 update using yum==
%%
# yum check-update
%%
%%
# yum update
%%

==See==
[[Yum Yum]]
YumEx

REFERRERS
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