错误一：

warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, key ID 092d7b2b
c5-testing/gpgkey                                        | 1.8 kB     00:00

Public key for kernel-uek-headers-2.6.32-300.11.1.el5uek.x86_64.rpm is not installed

原因是yum安装了旧版本的gpgkey，用下面的命令可解决

#rpm –import /etc/pki/rpm-gpg/RPM*

错误二：

再次yum update出现MySQL Transaction Check Error
Transaction Check Error:
file /etc/my.cnf from install of mysql-5.0.95-1.el5_7.1.i386 conflicts with file from package mysql-libs-5.0.84-2.el5.centos.i386
file /usr/lib/mysql/libmysqlclient.so.15.0.0 from install of mysql-5.0.95-1.el5_7.1.i386 conflicts with file from package mysql-libs-5.0.84-2.el5.centos.i386
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