apt-get remove metasploit-framework
apt-get install metasploit-framework
但是会出现各种问题
重装失败，显示找不到需要的软件，更换source源后重新安装。
vim /etc/apt/sources.list
添加这两行（任选）
#中科大
deb http://mirrors.ustc.edu.cn/kali kali-rolling main non-free contrib
deb-src http://mirrors.ustc.edu.cn/kali kali-rolling main non-free contrib
#阿里云
#deb http://mirrors.aliyun.com/kali kali-rolling main non-free contrib
#deb-src http://mirrors.aliyun.com/kali kali-rolling main non-free contrib
#清华大学
#deb http://mirrors.tuna.tsinghua.edu.cn/kali kali-rolling main contrib non-free
#deb-src https://mirrors.tuna.tsinghua.edu.cn/kali kali-rolling main contrib non-free
#浙大
#deb http://mirrors.zju.edu.cn/kali kali-rolling main contrib non-free
#deb-src http://mirrors.zju.edu.cn/kali kali-rolling main contrib non-free
#东软大学
#deb http://mirrors.neusoft.edu.cn/kali kali-rolling/main non-free contrib
#deb-src http://mirrors.neusoft.edu.cn/kali kali-rolling/main non-free contrib
#官方源
#deb http://http.kali.org/kali kali-rolling main non-free contrib
#deb-src http://http.kali.org/kali kali-rolling main non-free contrib
#重庆大学
#deb http://http.kali.org/kali kali-rolling main non-free contrib
#deb-src http://http.kali.org/kali kali-rolling main non-free contrib
apt-get update
apt-get install metasploit-framework
You must use Bundler 2 or greater with this lockfile.
这个错误的原因的bundler插件版本过低，可能是因为某些gem更新了，所以我们来安装更高版本的bundler插件，这样错误就解决了
gem update --system
bundler -v
gem install bundler -v2.0.2
Successfully installed bundler-2.0.2
NOTE: Gem::Specification#rubyforge_project= is deprecated with no replacement. It will be removed on or after 2019-12-01.
Gem::Specification#rubyforge_project= called from /usr/share/rubygems-integration/all/specifications/erubis-2.7.0.gemspec:16.
NOTE: Gem::Specification#rubyforge_project= is deprecated with no replacement. It will be removed on or after 2019-12-01.
Gem::Specification#rubyforge_project= called from /usr/share/rubygems-integration/all/specifications/multipart-post-1.2.0.gemspec:16.
/usr/lib/ruby/vendor_ruby/rubygems/defaults/operating_system.rb:10: warning: constant Gem::ConfigMap is deprecated
Parsing documentation for bundler-2.0.2
Installing ri documentation for bundler-2.0.2
Done installing documentation for bundler after 4 seconds
1 gem installed
成功安装2.0.1版本的bundler后，可是执行msfconsole还是同样报错，这里得找Gemfile.lock的路径
cd /usr/share/metasploit-framework/
bundler update
# 报错如下
Traceback (most recent call last):
2: from /usr/local/bin/bundler:23:in `<main>'
1: from /usr/local/lib/site_ruby/2.5.0/rubygems.rb:308:in `activate_bin_path'
/usr/local/lib/site_ruby/2.5.0/rubygems.rb:289:in `find_spec_for_exe': can't find gem bundler (>= 0.a) with executable bundler (Gem::GemNotFoundException)
最后pcat经过一番摸索，发现最主要的是：安装的bundler版本需要大于等于Gemfile.lock中要求的版本
cd /usr/share/metasploit-framework/ cat Gemfile.lock | grep -A 1 "BUNDLED"
得到bundler的版本
BUNDLED WITH 2.1.4
gem update --system gem install bundler -v 2.1.4
查看源是否最新
gem sources -l*** CURRENT SOURCES ***
https://rubygems.org/
https://gems.ruby-china.com
gem sources --remove https://gems.ruby-china.org/
gem sources -a https://gems.ruby-china.com
往下面可能还有坑，这个是从网上找的，但是我放弃了。。。。我选了下载2020kaili，不这样玩了，忒累。。。。
-= UPDATE 2020.05.02 =-
有好友反映按照pcat上面的方法更新后，运行msfconsole还会报错：
/usr/lib/ruby/vendor_ruby/rubygems/defaults/operating_system.rb:10: warning: constant Gem::ConfigMap is deprecated /usr/lib/ruby/vendor_ruby/rubygems/defaults/operating_system.rb:10: warning: constant Gem::ConfigMap is deprecated Could not find json-2.3.0 in any of the sources Run `bundle install` to install missing gems.
pcat经过测试后发现gem的版本最近更新得很高，为3.1.2，而且还带来很多warning。
# 例如 NOTE: Gem::Specification#rubyforge_project= is deprecated with no replacement. It will be removed on or after 2019-12-01.
经搜索github上有一个做法是：
gem update --system 3.0.6
这是不可取的，这是把gem的版本降低，虽然降了后可以运行msfconsole，但是bundler、wpscan等运行也会报错。
经多番测试，发现只有把gem更新到3.2.0才可以，直接更新是不行的，必须源码安装：
# 源码安装gem 3.2.0 git clone https://github.com/rubygems/rubygems cd rubygems ruby setup.rb # 再进行修复 apt install ruby-dev -y apt install libpq-dev libpcap-dev libsqlite3-dev -y cd /usr/share/metasploit-framework/ sed -i 's#https://rubygems.org#https://gems.ruby-china.com#' Gemfile bundler install --no-deployment gem install json -v '2.3.0'
这样msfconsole就可以使用了。
不过ruby新版有不少warning：
/usr/lib/ruby/vendor_ruby/rubygems/defaults/operating_system.rb:10: warning: constant Gem::ConfigMap is deprecated /usr/lib/ruby/vendor_ruby/rubygems/defaults/operating_system.rb:29: warning: constant Gem::ConfigMap is deprecated /usr/lib/ruby/vendor_ruby/rubygems/defaults/operating_system.rb:30: warning: constant Gem::ConfigMap is deprecated # 解决方法 sed -i "s#Gem::ConfigMap\[:arch\]#RbConfig::CONFIG\['arch'\]#g;s#Gem::ConfigMap\[:ruby_version\]#RbConfig::CONFIG\['ruby_version'\]#g" /usr/lib/ruby/vendor_ruby/rubygems/defaults/operating_system.rb
/usr/share/rubygems-integration/all/gems/mime-types-3.2.2/lib/mime/types/logger.rb:30: warning: `_1' is reserved for numbered parameter; consider another name /usr/share/rubygems-integration/all/gems/mime-types-3.2.2/lib/mime/types/logger.rb:30: warning: `_2' is reserved for numbered parameter; consider another name /usr/share/rubygems-integration/all/gems/mime-types-3.2.2/lib/mime/types/logger.rb:30: warning: `_3' is reserved for numbered parameter; consider another name # 暂时没好的解决方法 # 如果不想显示warning export RUBYOPT='-W0'
rubygems最近修改得不少，要想等到一个相对稳定的版本，还需要一段时间。