/usr/local/lib/site_ruby/2.7.0/rubygems/dependency.rb:313:in `to_specs': Could not find 'nokogiri' (~> 1.8.0) - did find: [nokogiri-1.10.9] (Gem::MissingSpecVersionError)
Checked in 'GEM_PATH=/root/.local/share/gem/ruby/2.7.0:/var/lib/gems/2.7.0:/usr/lib/x86_64-linux-gnu/rubygems-integration/2.7.0:/usr/share/rubygems-integration/2.7.0:/usr/share/rubygems-integration/all' , execute `gem env` for more information
12: from /usr/bin/wpscan:23:in `<main>'
11: from /usr/local/lib/site_ruby/2.7.0/rubygems.rb:298:in `activate_bin_path'
10: from /usr/local/lib/site_ruby/2.7.0/rubygems.rb:298:in `synchronize'
9: from /usr/local/lib/site_ruby/2.7.0/rubygems.rb:299:in `block in activate_bin_path'
8: from /usr/local/lib/site_ruby/2.7.0/rubygems/specification.rb:1367:in `activate'
7: from /usr/local/lib/site_ruby/2.7.0/rubygems/specification.rb:1385:in `activate_dependencies'
6: from /usr/local/lib/site_ruby/2.7.0/rubygems/specification.rb:1385:in `each'
5: from /usr/local/lib/site_ruby/2.7.0/rubygems/specification.rb:1403:in `block in activate_dependencies'
4: from /usr/local/lib/site_ruby/2.7.0/rubygems/specification.rb:1367:in `activate'
3: from /usr/local/lib/site_ruby/2.7.0/rubygems/specification.rb:1385:in `activate_dependencies'
2: from /usr/local/lib/site_ruby/2.7.0/rubygems/specification.rb:1385:in `each'
1: from /usr/local/lib/site_ruby/2.7.0/rubygems/specification.rb:1396:in `block in activate_dependencies'
/usr/local/lib/site_ruby/2.7.0/rubygems/specification.rb:1399:in `rescue in block in activate_dependencies': Could not find 'nokogiri' (~> 1.8.0) among 255 total gem(s) (Gem::MissingSpecError)
Checked in 'GEM_PATH=/root/.local/share/gem/ruby/2.7.0:/var/lib/gems/2.7.0:/usr/lib/x86_64-linux-gnu/rubygems-integration/2.7.0:/usr/share/rubygems-integration/2.7.0:/usr/share/rubygems-integration/all' at: /usr/share/rubygems-integration/all/specifications/cms_scanner-0.0.41.3.gemspec, execute `gem env` for more information
尝试过
gem install pkg-config
apt-get install libxml2-dev libxslt-dev zlib1g-dev -y
gem install nokogiri -- --use-system-libraries
但也没用，只能先卸载，再以gem方式来重装wpscan
pcat尝试过以apt方式来安装wpscan，但总会出现public_suffix的依赖冲突。
apt remove wpscan -y
apt-get autoremove -y
apt-get autoclean
hash -r
apt install ruby-dev -y
gem install wpscan