一、下载安装包
下载主页：https://www.auckland.ac.nz/en/for/current-students/cs-current-pg/cs-current-pg-support/vpn/cs-cisco-vpn-client-for-linux.html
里面有安装说明，但不能用了，估计已经过时了，可直接点击下面进行下载。
32位下载：https://www.auckland.ac.nz/content/dam/uoa/central/for/current-students/postgraduate-students/documents/anyconnect-predeploy-linux-3.1.04072-k9.tar
64位下载：https://www.auckland.ac.nz/content/dam/uoa/central/for/current-students/postgraduate-students/documents/anyconnect-predeploy-linux-64-3.1.04072-k9.tar
二、安装预备软件
sudo apt-get install lib32z1 lib32z1-dev lib32ncurses5 lib32ncurses5-dev
三、解压安装
tar -xf anyconnect-predeploy-linux-64-3.1.04072-k9.tar
cd anyconnect-3.1.04072/vpn
sudo ./vpn_install.sh