安装Oracle 11G R2时遇到了如下错误：
error: "net.bridge.bridge-nf-call-ip6tables" is an unknown key
error: "net.bridge.bridge-nf-call-iptables" is an unknown key
error: "net.bridge.bridge-nf-call-arptables" is an unknown key
如何解决：
[root@localhost ~]# modprobe bridge
[root@localhost ~]# lsmod |grep bridge