CentOS升级流程

yum clean all
yum update glibc\* -y
yum update yum\* rpm\* pyth\* -y
yum clean all
yum update mkinitrd nash -y
yum update selinux\* -y
yum update -y
shutdown -r now

yum clean all yum update glibc\* -y yum update yum\* rpm\* pyth\* -y yum clean all yum update mkinitrd nash -y yum update selinux\* -y yum update -y shutdown -r now