I am trying to install jekyll. But I am getting this error:
$ gem install jekyll bundlerERROR: Could not find a valid gem 'jekyll' (>= 0), here is why: Unable to download data from https://rubygems.org/ - Gem::Net::OpenTimeout: Failed to open TCP connection to rubygems.org:443 (execution expired) (https://rubygems.org/specs.4.8.gz)How can I fix this issue? Why is it occurring?
Here are the installed prerequisites (https://jekyllrb.com/docs/installation/ubuntu/):
$ ruby -vruby 3.0.2p107 (2021-07-07 revision 0db68f0233) [x86_64-linux-gnu]$ gem -v3.5.14$ gem update --systemERROR: Your RubyGems was installed trough APT, and upgrading it through RubyGemsitself is unsupported. If you really need the latest version of RubyGems (tip:you usually don't), then you need to install RubyGems (and Ruby) manually,maybe using tools like ruby-install, rvm, etc.$ gem envRubyGems Environment: - RUBYGEMS VERSION: 3.5.14 - RUBY VERSION: 3.0.2 (2021-07-07 patchlevel 107) [x86_64-linux-gnu] - INSTALLATION DIRECTORY: /var/lib/gems/3.0.0 - USER INSTALLATION DIRECTORY: /home/rafi/.local/share/gem/ruby/3.0.0 - RUBY EXECUTABLE: /usr/bin/ruby3.0 - GIT EXECUTABLE: /usr/bin/git - EXECUTABLE DIRECTORY: /usr/local/bin - SPEC CACHE DIRECTORY: /home/rafi/.cache/gem/specs - SYSTEM CONFIGURATION DIRECTORY: /etc - RUBYGEMS PLATFORMS: - ruby - x86_64-linux-gnu - GEM PATHS: - /var/lib/gems/3.0.0 - /home/rafi/.local/share/gem/ruby/3.0.0 - /usr/local/lib/ruby/gems/3.0.0 - /usr/lib/ruby/gems/3.0.0 - /usr/lib/x86_64-linux-gnu/ruby/gems/3.0.0 - /usr/share/rubygems-integration/3.0.0 - /usr/share/rubygems-integration/all - /usr/lib/x86_64-linux-gnu/rubygems-integration/3.0.0 - GEM CONFIGURATION: - :update_sources => true - :verbose => true - :backtrace => true - :bulk_threshold => 1000 - REMOTE SOURCES: - https://rubygems.org/ - SHELL PATH: - /home/rafi/.local/bin - /home/rafi/bin - /usr/local/sbin - /usr/local/bin - /usr/sbin - /usr/bin - /sbin - /bin - /usr/games - /usr/local/games - /snap/bin - /snap/bin