打算更新一下kali里面的msf时遇到以下错误：
root@kali:~/Desktop# sudo msfconsole [*] Bundler failed to load and returned this error: 'cannot load such file -- bundler/setup' [*] You may need to uninstall or upgrade bundler
经查找，默认安装bundler的最新版本为2.14。
msfconsole依赖的版本是1.17.3，所以需要安装旧版本以继续
执行以下命令安装并更新：
gem install bundler:1.17.3 gem update --system
![成功解决ERROR: Could not install packages due to an EnvironmentError: [WinError 5] 拒绝访问。backend_agg.cp36](https://ucc.alicdn.com/images/user-upload-01/20201024003227775.png?x-oss-process=image/resize,h_160,m_lfit)
