重装系统后注意检查下面的配置
/etc/sysconfig/network-scripts/ifcfg-eth*
/etc/sysconfig/network
/etc/resolv.conf
/etc/sysconfig/static-routes
/etc/hosts
/var/spool/cron/root
/etc/fstab
/etc/sysconfig/iptables
/etc/passwd
/etc/group
/etc/shadow
.ssh/
visudo