最近遭遇一起云主机因安全防护措施不到位被安装挖矿程序的情况。 为提高云主机的安全性和考虑搭建一台跳板机来访问云主机以提高安全性。 目前主流且还在维护的JumpServer是比较好的解决方案，搭建一台JumpServer做测试。 这里使用ubuntu 20.04 lts作为OS。 安装操作系统后先修改软件仓库为国内163源。 sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak sudo nano /etc/apt/sources.list 注释掉原来的内容 添加网易源 #网易源 deb http://mirrors.163.com/ubuntu/ focal main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ focal main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ focal-security main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ focal-security main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ focal-updates main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ focal-updates main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ focal-backports main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ focal-backports main restricted universe multiverse 执行更新 sudo apt-get update && sud