ubuntu下由于内核更新，CiscoVPN无法登录的问题

错误提示信息：

Starting /opt/cisco-vpnclient/bin/vpnclient: module directory /lib/modules/2.6.24-21-generic/CiscoVPN not found.
Cisco Systems VPN Client Version 4.8.00 (0490)
Copyright (C) 1998-2005 Cisco Systems, Inc. All Rights Reserved.
Client Type(s): Linux
Running on: Linux 2.6.24-21-generic #1 SMP Tue Aug 12 13:37:22 UTC 2008 i686
Config file directory: /etc/opt/cisco-vpnclient

Could not attach to driver. Is kernel module loaded?
The application was unable to communicate with the VPN sub-system.

解决方法：

找到当前内核之前的旧版本内核，将此旧内核文件夹内的CisoVPN文件夹复制到当前内核版本的文件夹中，如：

旧内核版本：2.6.24-20-generic

当前内核版本：2.6.24-21-generic

进入/lib/modules

#cp -r ./2.6.24-20-generic/CiscoVPN/ ./2.6.24-21-generic/