818b Realtek无线网卡上网问题

家中闲置一台电脑，装上Ubuntu14.04，不想去拉网线了，就从某东商城入手一枚TP-Link TL-WN821N V5.0无线网卡，拿到电脑上一试，结果系统认不出此网卡，系统配置里也找不到相关硬件，
lsus结果如下，

Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 002: ID 04d9:0499 Holtek Semiconductor, Inc. Optical Mouse
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID 0bda:818b Realtek Semiconductor Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 009 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 008 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 007 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 006 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 011 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 010 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

由此可见，这个USB网卡系统是知道它的在在的，但是没有相关程序，现在我不知道这个ID 0bda:818b Realtek Semiconductor Corp. 无线网卡芯片组号是多少，请各位兄弟帮忙参详参详，谢谢！